1
Application Notes &
Product Data Sheet
Lithium Carbon-monofluo-
ride (BR) Coin Cells and FB
Encapsulated Lithium
Coin Cells
I. Introduction
Lithium has become a generic term representing a
family of battery systems in which Lithium metal is
used as the active anode material or negative elec-
trode. Variations in the cathode material, or positive
electrode, and the cell electrolyte result in-hundreds
of possible combinations of Lithium batteries.
Rayovac Lithium Carbon-monofluoride (BR)
batteries are a solid-cathode type which optimizes
reliability, safety, cost and performance.
II. Features
• Outstanding shelf life and excellent performance
over a wide temperature range
• Stable discharge voltage
• High energy density and voltage (3V)
• Enhanced safety by the use of Carbon-mono-
fluoride electrode material and a non-corrosive,
non-toxic electrolyte
• Excellent leak resistance
• Shelf life of ten years or more
• Pre-tinned terminals are solderable
• Available with many wave-solderable terminal
configurations
III. Quality Systems Certification
IV. Applications
The following devices are examples of good uses
for BR coin cells:
• Computer Memory and Real Time Clock Backup
• Electronic Counters, Process Controllers
• Portable Instruments
• Time/Data Protection
• Industrial Controls
• Electronic Gas, Water and Electric Meters
• Communication Equipment
• Tire Pressure Monitoring Systems (TPMS)
• RF Tags, Toll Tags, and ID Tags
• Portable Electronic Devices
Application Considerations
Rayovac BR coin cells and batteries should be
considered for applications that are characterized
by a need for:
• Miniaturization
• Leakage resistance
• Lightweight
• Shock and vibration tolerance
• Low to moderate current drains
• Environments requiring extended operation or
storage at a wide range of temperatures
• The need for flat discharge voltage and consistent
source impedance
• Long shelf life
• An extended service life due to low self-discharge
rate
• Enhanced safety and reduced product liability
concerns
• U.L. recognized components
RefeRence Guide
OEM/Technical Products
2
Today’s demand for high performance, small
footprint, reliable, and cost-effective electronic
products can be realized by identifying the best
match between the battery and its application.
To-do so requires a good understanding of the
device’s power requirements and the environment
in which it is used as well as how the battery reacts
to those loads and environments.
It is important that the battery be considered early
in the design process. This will allow the optimiza-
tion of battery life through the selection of power
conserving circuit components. Moreover, early
battery selection will also minimize circuit and
mechanical layout changes later in the design process.
The following is a list of basic application
characteristics and conditions that must be
considered for an optimum selection of a lithium
Carbon-monofluoride power source.
Electrical Characteristics
• Voltage: maximum/minimum
• Current drain
• Pulse currents
• Pulse time/frequency of occurrence
Application Goals
• Duty cycle
• Service life goal
• Shelf life goal
• Reliability
• Safety
• Battery availability
Packaging
• Shape
• Terminals
• Weight
• Contact materials
• Case materials
Environmental
• Operating temperature range
• Storage temperature range
• Humidity
• Shock and vibration
• Atmospheric pressure
VI. Battery Selection
Component Class Batteries and Cells
Today’s circuit designers recognize the capabilities
of BR Lithium coin cells and FB batteries to function
as permanent components in their circuits.
FB batteries exhibit reliability rates similar to diodes
and resistors.
The combination of very low power Complementary
Metal-Oxide Semiconductor (CMOS) memory
devices with high energy, long life batteries now
allow for batteries to be used as life-of-product
components.
The traditional approach to product design is to
provide sufficient energy to meet a design target
for a stated period, at which time the batteries
would be replaced. The decision to provide
component or expendable power is fundamental to
the product concept of the device being powered.
Component batteries allow the designer to increase
the reliability and functionality of the device by
eliminating the need for consumer replacement
of-batteries. Component batteries eliminate the
problems of reversed polarity, wrong chemical
system, mismatched capacities, and higher
operating costs. However, component batteries
require careful selection. The batteries must assure
adequate energy for the expected load to compen-
sate for self-discharge and the thermal environment
expected, and the batteries must also have a high
reliability connection to the circuit.
Gasket
Separator and Electrolyte
CFx Cathode
Current Collector
Lithium Anode
Cell Can
Anode Cap
(+)
(–)
V. Construction
3
Battery Life and Capacity Estimates
Rayovac has accumulated over 200 million device
hours of accelerated reliability testing with a
major semiconductor manufacturer. This data has
allowed us to gain a better under standing of the
time and temperature dependent wear out of BR
Lithium coin cells and FB batteries during storage.
Please contact Rayovac's OEM Division for more
information.
VII. Calculating Battery Life
The design of an electronic circuit powered by a
com ponent class battery requires the designer to
consider two interacting paths that determine a
battery’s life: consumption of active electro chemical
components and thermal wear-out.
To optimize battery life in powered devices, today’s
designers are first selecting power conserving
circuit components, and then specifying high
reliability component Lithium batteries. Battery
selection is based on an understanding of the
thermal capabilities, effects of the operating
environment, and the battery life requirements of
the powered device.
Figure 1, at right, gives an estimate of years of
service at various discharge currents for BR
Lithium coin cells at room temperatures.
Consumption of Active Battery Components
Batteries produce electrical current by oxidation
and reduction of their active electrochemical
components. Once these components are
consumed, the battery ceases to produce current.
The sum of the energy consumed by the circuit
over its expected life plus the-electrochemistry’s
inherent loss of energy due to-self-discharge,
represents the first path in determining battery life.
Thermal Wear-Out
The second path in determining battery life is
thermal wear-out, which is the loss of capacity
caused by thermal mechanisms. Generally, thermal
wear-out rates accelerate as temperatures in the
operating environment rise.
It is very important to hold the paths of self-
discharge and thermal wear-out as separate issues.
This is because self-discharge can sometimes
be compen sated for by increasing the specified
battery-capacity, while thermal wear-out can only
be addressed by selecting a more thermally capable
battery.
0.4
1
10
20
0.1 1 10 100
Discharge Time in Years
BR2335
BR1225
BR2032
BR2325
BR1632
Drain vs. Duration
Figure 1
4
B. Thermal Wear-Out
At high temperatures, Rayovac’s BR Lithium coin
cells and FB batteries offer significantly lower
failure rates over competing coin cells. Figure 3
shows the relationship between temperature and
the years to 1% failure of 12.5mm diameter cells
of-similar capacity. A failure is defined as a closed
circuit voltage less than 2.0 volts on a 250KΩ load
of 0.5 second duration.
VIII. Performance Characteristics
C. High Temperature Storage Performance
The advantage of Rayovac BR Lithium coin cell
per formance after high temperature storage is
further illustrated in the figure on the right. Figure
4 shows how the BR2325 coin cell compares
with other lithium carbon-monofluoride (BR) and
lithium manganese dioxide (CR) cells when stored
at high temperature. The data presents the results
of weekly closed circuit voltage measurements
on-a-1KΩ load at 0.5 second duration after high
temperature storage. The test was started at
a-storage temperature of 70°C and then later
increased to 85°C to allow for the temperature
limitations of the CR cell.
A. System Self-Discharge Comparison
BR Lithium Carbon-monofluoride cells offer
substantially lower self-discharge rates compared
to other battery chemistries. Figure 2 compares the
capacity loss due to self-discharge over a range
of temperatures for various battery chemistries.
BR Lithium coin cells provide self-discharge rates
of less than 0.3% per year and Lifex FB™ batteries
less than 0.2% per year.
Lithium
Manganese
Dioxide
Lithium Thionyl Chloride
90
80
70
60
50
40
30
20
010 20 30 40 50
Percent of Capacity Loss per Year
Temperature (ϒC)
Rayovac BR Lithium
Carbon-Monofluoride
Alkaline Manganese Dioxide
System Self-Discharge Rate vs. Temperature
90
80
70
60
50
40 0510 15
Rayovac FB
Rayovac BR Lithium
Generic Li-CFx (BR)
Li-MnO2
(CR)
Years of Life to 1% Failure
Temperature (ϒC)
Encapsulated
Lithium Coin Cells Temperature/Life Relationship
70ϒC85ϒC
020406080 100
0.0
1.0
2.0
3.0
4.0
Rayovac
BR2325
Generic
BR2325
Generic
CR2032
2.0 Volt Cutoff
Time (Weeks)
Closed Circuit Voltage (1KW @ 0.5 sec.)
High Temperature Performance Comparison
Figure 2
Figure 3
Figure 4
5
E. System Internal Resistance Comparison
Rayovac BR Lithium coin cells provide more
stable internal resistance throughout discharge
compared to lithium manganese dioxide coin cells
as shown in Figure 7. This is due to the formation of
conductive carbon as a discharge by-product in the
cell cathode during discharge. This carbon prevents
a-change in internal resistance until the active
components of the cell are consumed.
0
20
40
60
80
100
0
200
25 50 75
100 125 175150
Internal Resistance @ 1 KHz (Ohms)
Capacity (mAh)
Lithium Manganese
Dioxide (CR)
Rayovac
BR Lithium
D. Internal Operating Resistance
During-Discharge
Figure 5 below shows how the internal resistance
and voltage changes on a BR1225 cell as a percent
of discharge. Similar profiles with slightly different
values are observed with other cell sizes. The
typical initial 1KHz AC internal resistance for each
cell size is shown in Figure 6.
Typical Initial Internal Resistance
at 1 KHz AC
Internal Resistance
Cell Size (Ohms)
BR1225 85
BR1632 34
BR2032 25
BR2325 16
BR2335 21
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
50
100
150
200
250
0 10025 50 75
Voltage (V)
Internal Resistance @ 1 KHz (Ohms)
% Depth of Discharge
Internal Resistance
Closed Circuit Voltage
75
Internal Resistance and CCV of
BR1225 Cell During 30KΩ Discharge Internal Resistance During 30KΩ Discharge
BR2032 Cell vs. CR2032 Cell
Figure 5
Figure 6
Figure 7
BR Lithium Coin Cells -40°C to +85°C
(-40°F to +185°F)
FB Batteries -40°C to +100°C
(-40°F to +212°F)
F. Operating & Storage Temperature Range
Rayovac BR Lithium coin cells and FB batteries
provide excellent performance over a wide range
of temperatures. The operating and storage
temperature ranges are as follows:
6
G. Safety
Figure 8 below compares the safety of the three
most common Lithium systems. The figure
demonstrates that the Rayovac BR Lithium battery
components are extremely safe.
Rayovac BR Lithium batteries have been granted
U.L. Component Recognition (file no. MH12542).
The battery’s components are both chemically and
thermally stable before, during, and after discharge.
The electrolyte is both non-corrosive and non-toxic.
H. High Altitude Exposure
It is possible for components to be exposed
to-reduced pressures during shipment by air.
Rayovac BR Lithium batteries that were tested at
reduced pressures of 3 mm mercury for 10 days
and then discharged at normal rates exhibited the
following-results:
1. No change in cell appearance.
2. No observed leakage.
3. No change in resulting capacity.
RECOGNIZED UNDER THE COMPONENT
PROGRAM OF UNDERWRITERS LABOR-
ATORIES¤ INC.
Safety Comparison of Lithium Systems
Figure 8
Battery Electrolyte Electrolyte
System/IEC Cathode Cathode Salt Salt Electrolyte
Nomenclature Class Material Properties Material Property Solvent
Lithium Carbon- Solid Poly Carbon- Solid Lithium Tetra Stable Propylene
Monofluoride Cathode Monofluoride Stable Fluoroborate Carbonate &
Li/(CF)x LiBF4 1,2
BR Dimethoxyethane
(PC & DME)
Lithium Solid Manganese Solid Lithium Explosive PC & DME
Manganese Cathode Dioxide Stable Perchlorate
Dioxide LiCIO4
Li/MnO2
CR
Lithium Soluble Thionyl Liquid Lithium Tetra Corrosive Thionyl
Thionyl Chloride Cathode Chloride Toxic Chloroaluminate Chloride
LiSOCI2 Corrosive LiAICI4 (SOCI2)
7
I. Charging Characteristics
Although any charging of BR Lithium cells is to
be avoided, some charging may occur even in
a well designed electrical circuit due to leakage
current of the protecting diodes. The diode used
in a circuit design with a BR Lithium cell should
minimize leakage to within 3% of the rated
capacity of the cell over the lifetime of the cell's
use. Figure 9 below provides the maximum total
charge allowance for all cell sizes. Figure 10, which
illustrates these limits as they apply to the BR1225
& BR2325 cell sizes at various drain rates, follows.
Maximum Total Charge Allowance
J. Short Circuit Recovery
In the process of wave soldering tabbed versions
of the BR Lithium batteries to circuit boards, a
temporary short will occur. Figure 11 below shows
the voltage recovery of a Rayovac BR2325 coin cell
after a 5-second short circuit which would typically
occur in the wave soldering process.
K. Leakage Resistance
The electrolyte in BR Lithium batteries is based on
an organic solvent instead of a corrosive alkaline
or-acidic solution found in most conventional
batteries. This greatly improves the cell’s leakage
resistance and guards against the negative effects
caused by leakage.
L. Orientation
Since Rayovac batteries use solid active com ponents,
the performance characteristics described are
obtained regardless of the installation position.
.0001 .001 .01 .1 1 10
.1
1
10
100
BR1225
BR2325
Less than 3%
of Capacity
More than 3%
of Capacity
Time on Charge (Years)
Maximum Total Charge Allowance
24 hrs10 min0 10 sec 20 sec 30 sec 8 hrs 16 hrs
0
1
2
3
4
Elapsed Time After 5 Second Short
Open Circuit Voltage
Original OCV
BR2325 Voltage Recovery after 5 Second Short
Cell Rated 3% of
Size Capacity Capacity
BR1225 50 mAh 1.50 mAh
BR1632 130 mAh 3.90 mAh
BR2032 195 mAh 5.85 mAh
BR2325 180 mAh 5.40 mAh
BR2335 300 mAh 9.00 mAh
Formula to calculate charge current:
Imax(nA) = 114.15 x c
t
Where: Imax = Maximum allowable charge current in
nanoAmperes (nA)
c = Maximum total charge capacity in
mAh from table above
t = Time on charge in years
Figure 9
Figure 11
Figure 10
8
IX. Product Specifications
BR Lithium Coin Cells
A. Specification Table
Rayovac BR Lithium coin cells are available in a wide variety of tab and pin mounting configurations.
See-Product Availability Table (page 17) for a list of the most popular items.
*Consult Rayovac OEM Engineering Division for assistance in determining pulse capability for your application.
Figure 12
Rated Nominal Dimensions
Nominal Pulse
Part Capacity Capability Diameter Height Weight Volume NEDA IEC
Number (mAh) (mA*) (mm) (mm) (g) (cc) Number Number
BR1225 50 5 12.5 2.5 0.8 0.30 5020LB BR1225
BR1632 130 10 16.0 3.2 1.6 0.63 Not Assigned BR1632
BR2032 195 10 20.0 3.2 2.4 1.00 5004LB BR2032
BR2325 180 10 23.0 2.5 3.1 1.04 5002LB BR2325
BR2335 300 10 23.0 3.5 3.4 1.45 Not Assigned BR2335
9
BR1225
BR1632
B. Typical Discharge Curves
Figure 13
Figure 14
Figure 15
Figure 17
Figure 16
Figure 18
10
BR2032
Figure 20
Figure 19
Figure 21
BR2325
Figure 22
Figure 23
Figure 24
11
BR2335
Figure 25
Figure 26
Figure 27
12
C. Dimensional Drawings
Figure 28
.193"
(+) (–)
.310"
.120"
.492"
.400"
Tab Detail:
Figure 50
Figure 29
(+) (–)
.492"
.747"
.366"
.114"
.120"
Tab Detail:
Figure 51 .094"
Figure 30
BR1225SR2
BR1225T2R
BR1225
For illustration only. Contact Rayovac for complete specifications.
INCHES MILLIMETERS
0.020 ...... 0.51
0.065 ...... 1.65
0.094 ...... 2.39
0.098 ...... 2.49
0.110 ...... 2.79
0.114 ...... 2.90
0.115 ...... 2.92
0.120 ...... 3.05
0.125 ...... 3.18
0.130 ...... 3.30
0.150 ...... 3.81
0.193 ...... 4.90
0.220 ...... 5.59
0.270 ...... 6.86
0.310 ...... 7.87
0.366 ...... 9.30
0.387 ...... 9.90
0.400 ......10.16
0.492 ......12.50
0.712 ......18.08
0.747 ......18.97
Conversion Chart
.492"
.400"
.270"
.120"
(+) (–)
.387"
Tab Detail:
Figure 50
Figure 31
BR1225T2
(+)(–)
.110"
.492"
.400"
Tab Detail:
Figure 52
.150"
.270"
.020"
Figure 33
BR1225T3H
.220"
.125"
.492"
.130"
.150"
(+)
(–)
.712"
.115"
.065"
Tab Detail:
Figure 50
Figure 32
BR1225T2V
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
13
3V
BR1632DK2
LITHIUM
USA
(+)
(–)
.770"
.684"
.266"
2.04"
1.27"
BLACK
RED
Contact Rayovac for complete
connector detail and specs.
Figure 35
BR1632DK2
Figure 34
BR1632
For illustration only. Contact Rayovac for complete specifications.
.244"
.120"
(+) (–)
.600"
.387"
.630"
Tab Detail:
Figure 50
Figure 36
BR1632T2
INCHES MILLIMETERS
0.120 ...... 3.05
0.126 ...... 3.20
0.244 ...... 6.20
0.266 ...... 6.76
0.270 ...... 6.86
0.387 ...... 9.83
0.600 ......15.24
0.626 ......15.90
0.630 ......16.12
0.684 ......17.37
0.770 ......19.56
1.270 ......32.30
2.040 ......51.82
Conversion Chart
Figure 37
BR1632R81
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
14
.242"
.120"
(+) (–)
.600"
.359"
.787"
Tab Detail:
Figure 50
Figure 40
BR2032T2K
.242"
.120"
(+) (–)
.800"
.359"
.787"
Tab Detail:
Figure 50
Figure 39
BR2032T2
.216"
.120"
(+) (–) (+)
.550"
.400"
.357"
.700" .817"
.787"
Tab Detail:
Figure 53
Figure 41
BR2032T3L
INCHES MILLIMETERS INCHES MILLIMETERS
0.098 2.49 0.415 10.54
0.120 3.05 0.417 10.59
0.126 3.20 0.550 13.97
0.150 3.81 0.600 15.24
0.200 5.08 0.700 17.78
0.216 5.49 0.787 19.99
0.242 6.14 0.800 20.32
0.288 7.32 0.817 20.75
0.300 7.62 0.898 22.81
0.357 9.07 0.984 24.99
0.359 9.12 1.018 25.90
0.400 10.16
.300"
.150"
.898"
.417"
.800"
Tab Detail:
Figure 50
(+) (–)
BR2325T2
Figure 42
BR2325
Figure 44
Conversion Chart
For illustration only. Contact Rayovac for complete specifications.
Figure 38
BR2032
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
.288"
.098"
.898"
.800"
.984"
.415"
Pin Detail:
Figure 56
(–) (+)
.288"
.098"
.898"
.800"
.984"
.415"
Pin Detail:
Figure 55
(–) (+)
BR2325P2
Figure 43
.288"
.098"
.898"
.800"
.984"
.415"
Pin Detail:
Figure 56
(–) (+)
15
INCHES MILLIMETERS
0.098 2.49
0.102 2.59
0.120 3.05
0.138 3.51
0.153 3.89
0.154 3.91
0.180 4.57
0.200 5.08
0.231 5.91
0.244 6.20
0.270 6.86
0.300 7.62
0.387 9.83
0.400 10.16
0.550 13.97
0.600 15.24
0.625 15.88
0.700 17.78
0.800 20.32
0.898 22.81
0.928 23.57
1.130 28.70
1.250 31.80
Conversion Chart
Figure 46
BR2335SM
Figure 47
BR2335T2
Figure 45
BR2335
Figure 48
BR2335T3L
BR2335T3V
For illustration only. Contact Rayovac for complete specifications.
Figure 49
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
16
.030
.013
.019
.022
.019
.102
PRETINNED
AREA
MATERIAL: NICKEL 200
THICKNESS: .006"
TINNING: 100% Sn(Tin)
200 in. min.
SM and SR Tab Detail
Figure 51 Tab Style B
.027"
DIA
MATERIAL: PRETINNED
NICKEL 200
TINNING: 100% Sn(Tin)
100 µ in. min.
PCB DRILL: .040"
Pin Detail
Figure 55
Tab and Pin Detail
.032 ± .001 NO TAPER
.170 ± .025
TINNED AREA
.005 REF
.150
45˚
90°MATERIAL: NICKEL 200
THICKNESS: 0.006"
TINNING : NICKEL FLASH OVERALL
100% Sn(Tin) 200 µ in. min.
PCB DRILL: .040"
Figure 50 Tab Style A
Through Hole Tab Detail
POSITIVE TAB
MATERIAL: NICKEL 200
THICKNESS: 0.006"
TINNING : NICKEL FLASH OVERALL
100% Sn(Tin) 200 in. min.
PCB DRILL: .040"
.242"
.100"
.150"
.378"
.039"
.030"
T3H Tab Detail
Figure 52 Tab Style E
For illustration only. Contact Rayovac for complete specifications.
POSITIVE TAB
MATERIAL: NICKEL 200
THICKNESS: 0.006"
TINNING : NICKEL FLASH OVERALL
100% Sn(Tin) 200 µ in. min.
PCB DRILL: .040"
.242"
.100"
.150"
.378"
.039"
.030"
.55 ± .02
TAB WIDTH
.400
.032 .000
.003
+
–
.039
.039
.000
.003
+
–
R
45˚
T3L Positive Tab Detail
Figure 53 Tab Style F
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
.632
.600
.039 R TYP
.032 ± .002 TYP
.170 ± .025
TINNED AREA
MATERIAL: NICKEL 200
THICKNESS: 0.006"
TINNING : NICKEL FLASH OVERALL
100% Sn(Tin) 200 µ in. min.
PCB DRILL: .040"
T3V Positive Tab Detail
Figure 54 Tab Style H
17
X. Product Availability & Cross Reference Table
Stock Interchangeable Figure Case
Number* Description Numbers Number Tab Style Quantity
BR1225X-BA 3.0-volt, 50 mAh coin cell BR1225 28 N/A 1,680
BR1225T2R-B BR1225 with 2 Tabs – 29 A 1000
BR1225SR2-B BR1225 Surface Mount Style – 30 B 1,540
BR1225T2-B BR1225 with 2 Tabs BR1225-1HB 31 A 800
BR1225T2V-BA BR1225 with 2 Tabs - Vertical Mount BR1225-1VB 32 A 1,690
BR1225T3H-B BR1225 with 2 Tabs, 3 Stands - – 33 E 1000
Horizontal Mount
*Suffix “A” is to designate new case quantity.
*Suffix “-B” designates bulk packaged.
**Height difference - closest equivalent.
BR1632-BA 3.0-volt, 130 mAh coin cell – 34 N/A 740
BR1632DK2-BA BR1632 - Leaded coin cell – 35 N/A 528
BR1632T2-B BR1632 with 2 Tabs – 36 A 800
BR1632R81-BA BR1632 Surface Mount Style – 37 D 1000
BR2032-BA 3.0-volt, 195 mAh coin cell BR2032 38 N/A 680
BR2032T2-BA BR2032 with 2 Tabs BR2032-1HE1 39 A 500
BR2032T2K-BA BR2032 with 2 Tabs BR2032-1HSE* 40 A 539
BR2032T3L-BA BR2032 with 2 Tabs, 3 Stands BR2032-1GS** 41 F 500
BR2325-BA 3.0-volt, 180 mAh coin cell BR2325 42 N/A 560
BR2325P2-BA BR2325 with 2 Pins – 43 PIN 550
BR2325T2-BA BR2325 with 2 Tabs BR2325-1HB, BR2325-1HE 44 A 550
BR2335-BA 3.0-volt, 300 mAh coin cell BR2330** 45 N/A 560
BR2335SM-BA BR2335 Surface Mount Style
-
46 B 450
BR2335T2-BA BR2335 with 2 Tabs BR2330-1HE** 47 A 500
BR2335T3L-BA BR2335 with 2 Tabs, 3 Stands BR2330-1GU** 48 F 500
BR2335T3V-BA BR2335 with 3 Stands - Vertical BR2330-1VG** 49 H 525
18
Rayovac FB batteries consist of two Lithium
Carbon-monofluoride coin cells encapsulated within
a glass filled polyester molded housing. The FB
series of batteries are configured to allow for series
or parallel interconnection between the cells.
FB batteries utilize Rayovac BR Lithium Carbon-
monofluoride technology to assure the greatest
reliability at very wide temperatures and the lowest
self-discharge rate.
A. Features
• Meets or exceeds typical hermetically sealed
battery shelf life vs. temperature capability
Operating Temperature Range:
-40°C to + -100°C (-40°F to +212°F)
• PCB mountable, wave solderable, and process
tolerant
• Inherently safe chemistry
• Application flexibility
• Robotically placeable
B. Typical Applications
• Time/data protection
• Industrial control
• Communication equipment
• Portable Instruments
C. Specification Table
* Consult Rayovac OEM Engineering Division for assistance in determining pulse capability for your
application.
**Height above circuit board.
NEDA and IEC numbers have not been assigned to FB products.
Nominal
Dimensions Nominal Nominal Pulse
Part Voltage Capacity Capability
Number (volts) (mAh) (mA*) Width Length Height** Weight Volume
FB1225H2 3.0 Parallel 100 Parallel 16 Parallel 15.9 mm 15.9 mm 10.3 mm 4.2 g 2.00 cc
6.0 Series 50 Series 8 Series (0.625") (0.625") (0.405") (0.15 oz.) (6.12 in3)
FB2325H2 3.0 Parallel 360 Parallel 20 Parallel 25.4 mm 25.4 mm 10.8 mm 11.9 g 6.14 cc
6.0 Series 180 Series 10 Series (1.000") (1.000") (0.425") 0.42 oz.) (0.375 in3)
X. FB Lithium Carbon-monofluoride Batteries
19
E. Dimensional Drawing
6.0
3.0
0.0
0 200100 300 400
Capacity
Voltage
FB2325H2 Typical Battery Discharge Curves
(Refer to page 10 for individual cell)
Series
Connected
Parallel
Connected
D. Typical Discharge Curves
INCHES MILLIMETERS
.100 2.5
.375 9.5
.395 10.0
.400 10.2
.405 10.3
.425 10.8
.555 14.1
.575 14.6
.625 15.9
.700 17.8
1.000 25.4
Conversion Chart
6.0
3.0
0.0
05025 75 100
Capacity
Voltage
FB1225H2 Typical Battery Discharge Curves
(Refer to page 9 for individual cell)
Series
Connected
Parallel
Connected
Figure 57 Figure 58
Figure 59 Figure 60
For illustration only. Contact Rayovac for complete specifications.
FB2325H2
FB1225H2
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
20
BT2 (+)
BT2 (–)
BT1 (+)
BT1 (–)
.300"
.700" 1.140"
ORIENTING
PIN
.700"
1.140"
.495"
.030"
.061" ± .003"
DIA TYP
.137"
.632"
BT2 (+)
BT2 (–)
BT1 (+)
BT1 (–)
.300"
.700" 1.140"
ORIENTING PIN
#
55
DRILL (
.052"
)
.700"
1.140"
.220"
.220"
TERMINAL (TYP)
#
52
DRILL (.
0635"
)
Relex™ Socket RH23H2 PCB Layout
XI. Relex™ Socket
The Relex RH23H2 is a printed circuit board
mountable battery socket for use with Rayovac’s
FB2325H2 battery. This device provides excellent
component retention and a gas tight, reliable
electrical contact. Its self-orienting design assures
proper polarity installation without desoldering or
the use of special tools.
B. Dimensional Drawings
INCHES MILLIMETERS
.003 0.1
.030 0.8
.061 1.5
.137 3.5
.220 5.6
.300 7.6
.495 12.6
.632 16.1
.700 17.8
1.140 28.9
Conversion Chart
A. Features
• Improved contact reliability over conventional
holders
• Printed Circuit Board (PCB) mountable, wave
solderable, and process tolerant
• Molded in standoff for thorough post reflow
cleaning
• Excellent battery retention in shock and vibration
• Tin on tin, gas-tight spring contacts
Figure 61 Figure 62
For illustration only. Contact Rayovac for complete specifications.
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
21
A. Storage and Date Codes
BR Lithium cells and FB Lithium batteries are
electrochemical devices which depend upon
internal chemical reactions to produce electrical
power. These reactions are accelerated by high
temperatures and retarded by low temperatures.
Therefore, to minimize power loss during storage,
batteries should be stored at ambient temperature,
21°C (70°F). Storage at lower temperatures is not
necessary nor recommended due to the possibility
of shorting from moisture condensation.
To maximize battery power, the following storage
procedures should be observed:
1. Rotate inventory. Maintain a first in, first out
method of stock storage and usage. The
manufacture date of Rayovac cells and batteries
are identified by a date code stamped on the
individual products.
2. Avoid storage in high temperature areas. Make
sure that cells and batteries are stored away
from hot air vents, radiators, motors, and
equipment that generates heat. Avoid storage
near windows or skylights where the sun can
generate heat.
B. General Precautions
• BR Lithium cells and FB Lithium batteries
should not be inserted improperly, recharged, or
disposed of in fire
• Take precautions to insure correct polarity of the
battery in the device
• Recharging of batteries may cause leakage
• Never short-circuit, disassemble, or subject
batteries to excessive heat
• Never expose Lithium to moisture
• Do not solder directly to battery case
• Improper welding can damage internal
components and impair battery performance
• Damaged or penetrated batteries could present a
fire hazard. Handle all damaged batteries with this
caution in mind.
C. Handling and Shipping
Batteries are vulnerable to short circuiting if not
handled, packaged, or transported properly. Cell
types which have their positive and negative
terminations in close proximity to each other, or
tabbed cells, are particularly susceptible to short
circuiting if not handled properly. In prototyping
and assembly operations, care should be taken
to avoid placing these products on conductive
antistatic mats.
To avoid potential short circuit and shipping
damage situations:
1. Always store the batteries in the trays and/or
cartons in which they were shipped. Whenever
possible, reship the batteries in undamaged
original trays and/or cartons.
2. Rayovac offers individually packaged cells and
batteries, designated by a "-1" suffix on the part
number. This allows for the safe handling and
transport of batteries in smaller quantities.
3. Never ship batteries or completed circuit boards
with installed batteries in anti-static bags as
the bags are conductive and will short out
the battery.
4. Use caution with measuring equipment. Insulate
metal micrometers and calipers with tape to
avoid short circuiting batteries during
dimensional checks.
5. Make sure batteries installed in equipment
are securely or permanently installed prior
to packaging.
XII. Recommended Storage, Handling and Disposal Procedures
22
D. Transportation Regulations
Transportation of Lithium batteries is regulated by
the U.S. Department of Transportation (USDOT),
the International Civil Aviation Organization (ICAO),
International Air Transport Association (IATA)
and the UN International Maritime Organization
(IMO). For Rayovac BR and FB solid cathode
Lithium metal coin cells and batteries, the quantity
of Lithium metal is one of two key determinants
that define the applicable regulations and
requirements with the other key being the mode of
transportation.
For the Lithium quantity: Rayovac BR Lithium coin
cells contain less than 0.5 grams of Lithium metal
and Rayovac FB Lithium batteries contain less than
1.0 gram of Lithium metal.
All of Rayovac's BR Lithium cells and FB Lithium
batteries meet the following requirements:
1. Ground/Domestic
a. USDOT Code of Federal Regulations, Title
49, Part 173.185 and special provision 188.
USDOT requires a label on all shipping cartons
shipped into, out of or within the US noting
the Lithium metal cells/batteries are forbidden
on passenger aircraft, even on those
cartons shipped only via highway, rail or vessel
transportation. See special provisions 188 and
A100.
These Rayovac cells and batteries must
be packaged in an inner carton and a strong
shipping carton meeting the requirements of
part 178, subparts L and M at the Packing
Group II performance level. They must
be packed in a manner to prevent short circuits
including movement that could lead to short
circuits.
2. Air
ICAO and IATA, Packing Instruction (PI) 968 for
Lithium metal batteries alone. (Also see PI 969
for batteries packed with equipment and PI 970
for batteries contained in equipment.) Lithium
metal cells & batteries shipping alone or with
equipment require the Lithium battery warning
label on the shipping carton. (Check PI 970 for
when the label is required for batteries contained
in equipment.)
These Rayovac cells and batteries must be
packaged in an inner carton and a
strong shipping carton meeting the
requirements of 5.0.2.4, 5.0.2.6.1, and
5.2.1.2.1. They must be completely enclosed
and packed in a manner to prevent short circuits
including contact with conductive materials
within the carton that could lead to a short
circuit.
3. Ocean
International Maritime Dangerous Goods Code
(IMDG), Amendment 34-08. See
special provision 188 and 230. The Rayovac
cells and batteries must be packed in
strong shipping cartons and packed to prevent
short circuits.
4. ROHs compliant Lead Free (pb Free)
23
E. Disposal
This statement is provided as a service to those
who may want information concerning the safe
disposal of waste Rayovac BR and FB (Lithium
Carbon-monofluoride) battery products for the
USA. These products may be distinguished from
other battery products by the presence of the
letters BR or FB in the product designation, and are
manufactured in a disk or "coin" shape and square
modules.
This information does not apply to any other
Lithium chemistry or Lithium Carbon-monofluoride
products in other form factors.
Note: Where regulations regarding management of
spent/waste Lithium batteries exist outside of the
USA, they generally differ significantly from United
States regulations. For information regarding
recommended disposal and management practices
in regions or countries other than the USA, please
contact Rayovac at 1-800-237-7000 within the
USA, or 608-275-3340 if outside the USA.
Regarding Rayovac BR Lithium cells and FB
Lithium battery waste battery management in the
USA:
Waste BR Lithium cells and FB Lithium batteriess
are neither listed nor exempted from the USEPA
hazardous waste regulations. Waste BR and FB
Lithium products can be considered reactive
hazardous waste if there is a significant amount of
unreacted, or unconsumed Lithium remaining. This
potential problem may be avoided by discharging
waste cells and batteries prior to disposal. One
tested method for doing this is to place small
quantities of BR Lithium cells or FB Lithium
batteries into a metal container with sufficient
graphite to cover and surround the individual cells.
This procedure will discharge the cells in
approximately two weeks to the point where no
reactive Lithium remains. The cells may then be
disposed of as nonhazardous waste in an ordinary
landfill under Federal regulations. The graphite
can be reused many times, as needed, or can be
disposed of as nonhazardous waste.
Transportation Regulations The table below summarizes the specific requirements for each agency.
United States International
Regulatory Agency U.S. Department of 1. International Civil Aviation Organization (ICAO)
Transportation (DOT) 2. International Air Transport Association (IATA)
Regulation Title 49 CFR 173.185 IATA Dangerous Goods Regulations
Authorized Modes All modes (Air - by cargo aircraft only) Air
of Transportation
Testing Required These Rayovac cells and batteries These Rayovac cells and batteries have passed
have passed the UN Model the UN Model Regulations, Manual of Test and
Regulations, Manual of Test and Criteria, Part III, subsection 38.3
Criteria, Part III, subsection 38.3
Special Packaging Use an inner carton inside a strong Use an inner carton inside a strong outer shipping
outer shipping carton carton. Gross wt can be no more than 2.5 kg
Hazard Class UN3090, Class 9 but exempted by UN3090, Class 9 but exempted by meeting the
and Required special provision 188 requirements of packing instruction 968
Shipping Name
Labels Required Forbidden on passenger aircraft - all. Lithium warning label Forbidden on passenger
Lithium warning label - air aircraft - US.
Lithium Metal Limits Cells: 1.0 gram Cells: 1.0 gram
Batteries: 2.0 grams Batteries: 2.0 grams
24
Other Disposal Methods
For a list of facilities with demonstrated ability to
manage waste BR Lithium cells and FB Lithium
battery products as hazardous waste, please click
here. The list is not guaranteed to be all inclusive,
nor does it seek to exclude potential service
suppliers. Rayovac provides it as a customer
service to assist the customer in determining what
their management options could be. Always review
your choice of firm before sending wastes.
Cautions
Under United States Federal law, waste generators
are responsible for their wastes. Be sure to check
your regional, national, or local regulations as they
may differ significantly. Always remember that
waste battery products may still have considerable
energy remaining in them. Handle such products
with care and in accordance with applicable
USDOT, IATA, or ICAO regulations.
F. Soldering
Rayovac's BR and FB component class Lithium
batteries are suitable for direct soldering onto
printed circuit boards (PCB). A welded tab or pin
soldered to a PCB will ensure the highest contact
reliability available. Observe these precautions to
assure life-of-product reliability:
1.Hand Soldering
Never solder directly to cell cases. The resultant
heat will cause permanent internal damage to
the cell. Soldering of tabbed batteries should be
accomplished with a low wattage soldering iron
by applying heat just long enough to achieve a
good connection.
Please Note: Current Rayovac BR Lithium products are not compatible with Surface
Mount Technology (SMT) soldering processes due to the extreme temperatures
required for reflow. Batteries should be added as a secondary operation.
2.Wave Soldering
During the period when the battery tabs or pins
are in the solder bath, the battery is short
circuited. If this period is kept to under 5
seconds the battery capacity loss will be
minimized. Following a short circuit the battery
voltage will recover to above 2.5 volts almost
immediately while full recovery to its final
working voltage may take hours or even days.
This characteristic must be taken into account
when making electrical measurements on
recovering batteries or when establishing
manufacturing pass/fail points.
3.Surface Mount Technology
Rayovac offers a full line of surface mount
Lithium cells configurations. These cells are
indicated by the suffix "SM" or "SR" in the
stock number. The surface mount batteries
have configurations that allow for easy
board mounting.
Current BR and FB Lithium products are not
compatible with Surface Mount Technology
(SMT) soldering processes due to the extreme
temperatures required for reflow. Batteries
should be added as a secondary operation.
Mixed technology boards that utilize both SMT
and traditional through-hole components have
been successfully fabricated.
G. Washing
It is important that PCB wash techniques are
compatible with Rayovac's Lithium BR and
FBbatteries. The seals of these batteries are
polypropylene and solvents that attack this material
should be avoided. The most common freon types
and deionized water have shown to be acceptable
cleaning solvents. Rayovac should be consulted if
there is any possibility of process related battery
damage.
25
Rayovac BR Lithium batteries have been accepted
by Underwriters Laboratories under their
Component Recognition Program and carries U.L.
File Number MH 12542. All recognized Lithium
batteries can be identified by the symbol
located on the data sheet.
For use in UL listed devices, these Lithium batteries
must be used in accordance to the following U.L.
conditions of acceptability.
A. Conditions of Acceptability
The use of these cells may be considered generally
acceptable under the conditions given below:
1. The cells are identified with producer’s name and
model designation on the cell.
2. These cells are intended for use as
components in devices where servicing of the
circuitry involving the cells and replacement
of the Lithium cells will be done by a trained
technician.
3. These cells are intended for use at ordinary
temperatures where anticipated high
temperature excursions are not expected to
exceed 100°C (212°F).
4. These cells can be used in series up to a
maximum of four cells of the same model
number. When used in series, they should all
be replaced at the same time using fresh cells
only. These cells should not be connected in
series with any other (other than the allowed
number of cells in series) power source that
would increase the forward current through
the cells.
XIII. U.L. Component Recognition
B. Protective Battery Circuits
D1
R1
Circuit
D1
D2
B1
Vcc
Circuit
Vcc
Diode or
Transistor
Switch
Diode or
Transistor
Switch
B1
Protective Redundant Diodes Protective Diode and Limiting Resistor
RECOGNIZED UNDER THE COMPONENT
PROGRAM OF UNDERWRITERS LABOR-
ATORIES
¤
INC.
For D1/D2 use Low reverse leakage current Silicon diodes.
Do not use low power Schottky diodes.
26
5. The circuit for these cells should include one of
the following:
A.- Two suitable diodes or the equivalent in
series-with the cells to prevent any reverse
(charging) current. The second diode is used
to provide protection in the event that one
should fail. Quality control, or equivalent
procedures shall be established by the
device’s manufacturer to insure the diode
polarity is correct for each unit.
– or –
B.- A blocking diode or equivalent to prevent
reverse (charging) current, and in the event
of-diode failure, the cell shall be further
protected against reverse (charging) current
in excess of the values shown in chart to the
right. The measure ment of this current shall
include appropriate abnormal tests.
Maximum Current
Cell Models (mA)
BR1225 3.0
BR1632 3.0
BR2032 4.0
BR2325 5.0
BR2335 5.0
FB1225 3.0
FB2325 5.0
Maximum Reverse Charging Currents
for Rayovac BR Lithium Coin Cells
Notice
This publication is furnished only as a guide. It is the user’s responsibility to determine suitability of the products described for
the user’s purpose (even if the use is described herein) and to take precautions for protection against any hazards attendant to
the handling and use of the products. Rayovac recommends prospective users test each application.
The battery products and arrangements described herein may be covered by patents owned by Rayovac or others. Neither this
disclosure nor the sale of products by Rayovac conveys any license under patent claims covering combinations of battery
products with other elements or devices. Rayovac does not assume liability for patent infringement arising from any use of
the products by the purchaser.
The technical data contained herein are not designed to be the basis for specifications. Rayovac’s OEM Engineering Division can
furnish data that can serve as the basis for specifications.
Rayovac Corporation • 601 Rayovac Drive • Madison, WI 53711-2497
Ph: 608-275-3340 • Fax: 608-275-4973 • E-mail: oem@rayovac.com