Ni-MH & Ni-CD rechargeable batteries , 1. 2V nominal voltage, which are with the following advantage: high capacity, excellent high rate charge and discharge performance, long cycle life up to 1000 times, good storage ability, no memory effect, environm-ental friendly, etc. The high drain type battery has been developed for application where are large . current (5-10CmA) discharge is required for a shorter time than the general battery, especially for power tools. The high temperature type battery . can be with stand a temperature up To 70 ℃ , during . the . charge current is reduced to 0.03 to 0.05CmA. It again feature superior charge efficiency and discharge capacity, especially for emergency lighting installations.