V 500 HT
Rechargeable Ni-MH Button
Data Sheet
Type Number: 55750
Sytem: Nickel Metal Hydride/
KOH Electrolyte
Nominal Voltage [V]: 1.2
Nominal Capacity C [mAh]: 500
Typical Capacity C [mAh]: 510
at 100 mA / 1.00 V
Weight, approx. [g] 14.0
Dimensions [mm]: min. max.
Length [l]: 24.0 24.2
Width Facing [w]: 33.9 34.1
Height [h]: 6.3 6.5
UL Recognition: MH13654
Coding: Manufacturing 5 digit code
(123 = day/4 = year/ 5 = version)
Temperature Ranges [°C] min. max.
Storage: less than 30 days -40 85
Discharge: -20 85
Charge: 0 85
Charging Method:
Normal Charging: 50 mA for 14 – 16 h
Accelerated Charging (20°C): 150 mA for 4 h
Time controlled, voltage control recommended
Fast Charging (20°C): 500 mA for h *
Trickle Charging: 5 - 15 mA
Overcharge (20°C): 15 mA continuous
50 mA up to 1 year
Charge Retention [%] at 20°C: 80
Capacity available after 1 month Storage at 20°C
Internal Resistance [Ohm]: 0.1
at charged cells, 20°C, DC: 0.2 CA/2 CA, (IEC 61951-2)
Impedance [Ohm]: 0.015
at charged cells, 20°C, AC: 1kHz, (IEC 61951-2)
Typical Capacities [mAh]:
at 500 mA / 0.9 V 400
at 1500 mA / 0.9 V 200
Max. Discharge Current (cont.) [mA]: 1500
Life Expectancy (typical):
IEC Cycle: 1000 Cycles (IEC 61951-2)
Trickle Charge: up to 5 years (20°C)
Trickle Charge: up to 3 years (45°C)
* (-dv = 5-10 mv/ cell; dT/dt=0.7°C/min)
Capacities based on normal charging
VARTA Microbattery GmbH, Daimlerstraße 1, D-73479 Ellwangen/Jagst Subject to change without prior notice !
Tel.: (+49) 7961/921-0, Telefax: (+49) 7961/921-553 Date of Issue: 08.02.2008
