rechargeable battery
Common term for a battery that can be recharged, such as NiMH or Li-ion cells used in everyday devices.
このリモコンは充電池を使っています。
This remote control uses rechargeable batteries.
充電池 is the rechargeable battery itself, while 充電器 is the device that charges it.
乾電池 is meant to be thrown away after use, whereas 充電池 is a rechargeable battery you can reuse many times.
Compound of 充 (じゅう, 'charge') + 電池 (でんち, 'battery'). The reading is standard on'yomi.