V 80 H
Rechargeable Ni-MH Button
Data Sheet
Type Number: 55608
System: Nickel Metal Hydride/
KOH Electrolyte
Nominal Voltage [V]: 1.2
Nominal Capacity C [mAh]: 70
Typical Capacity C [mAh]: 80
At 14 mA / 1.00 V
Weight, approx. [g] 4
Dimensions [mm]: min. max.
Diameter [d]: 15.4 15.5
Height [h]: 5.8 6.0
UL Recognition: MH 13654 (N)
Coding: Manufacturing 5 digit code
(123 = day/4 = year/ 5 = version)
Temperature Ranges [°C] min. max.
Storage: less than 30 days -40 65
Discharge: -20 65
Charge: 0 65
Charging Method:
Normal Charging: 7 mA for 14 – 16 h
Accelerated Charging (20°C): 14 mA for 7-8 h
Fast Charging: 35 mA for 3 h *
Time controlled, voltage control recommended
Trickle Charging: 2.1 mA
Overcharge (20°C): 7 mA continuous
14 mA up to 1 year
Charge Retention [%] at 20°C: 90
Capacity available after 1 month Storage at 20°C
Internal Resistance [Ohm]: 1.3
at charged cells, 20°C, DC: 0.2 CA/2 CA, (IEC 61951-2)
Impedance [Ohm]: 0.22
at charged cells, 20°C, AC: 1kHz, (IEC 61951-2)
Typical Capacities [mAh]:
at 70 mA / 0.90 V 53
Max. Discharge Current (cont.) [mA]: 140
Life Expectancy (typical):
IEC Cycle: 1000 Cycles
Trickle Charge: up to 6 years (20°C)
Trickle Charge: up to 3 years (45°C)
* for fully discharged cells, 20 °C
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: 04-05-19
