ER9V ER9V 9V ER9V CR9V 9V ER9V: Nominal capacity( 0.5mA-6.0v) : 1200mAh Nominal voltage: 10.8V Max. constant current: 50mA Max.pulse current: 100mA Weight: 40g Volume: 17.8* 27.5* 49.8mm Workable temperature: -55~ + 85