Its capacity varies very little according to rate of discharge and it is rugged with low impact sensitivity. However, NiCd has a low energy density and its rate of self-discharge is 8% per month. Its nominal voltage is 1.2V and goes up to 1.4V when fully charged. Its cut-off voltage is 1V. It can supply up to 500 charge and discharge cycles. Its working temperature ranges between -40°C and 60°C. It can be stored for up to two years between -20°C and 35°C.