A312H Datasheet
Characterisitcs:
Nominal Voltage: 0.45 -1.30 Volts (Seal tab on)
Working Voltage:
0.20 -0.41 Volts (Seal tab on)
Nominal Capacity:70mAh @ 3K Ohms
Gas Type: Hydrogen
Gas Volume:
Minimum 15 cc
Rated 20 cc
Maximum 30 cc
(Depending on gassing rate)