Nickel-cadmium alkaline batteries are generally required to have three constant charging methods, namely floating charge, equalizing charge and resume charging. (1) floating charge. Nickel-cadmium rechargeable alkaline batteries made after normal full charge into float. During the floating charge, both ends of the nickel-cadmium alkaline battery voltage between 1.35 ~ 1.3SV / only current of 1 ~ 2A / (Ah), long-term charging. If the voltage is too low, nickel-cadmium alkaline batteries tend to discharge status, low capacity, can not guarantee good working condition; if the voltage is too high, nickel-cadmium alkaline batteries tend to overcharge state, accelerated electrolyte consumption, and reduces the battery lifetime. (2) a balanced charge. During the floating charge once every six months equalizing charge; average charging voltage of 1.49 ~ 1.51V / only, the current limit for 0.25CsA. Charge 6 ~ 7h, to ensure the battery has good characteristics. (3) recovery charge. Nickel-cadmium alkaline batteries http://www.hndhdq.com.cn/ constant voltage charging after discharge, the average charging voltage is 1.49 ~ 1.51V / only, the charge current is limited to 0.25CsA. When the voltage reaches the set value, continue to charge 6 ~ 7h. --zhongqi