Jaguar Electronics RC2B 2-Slot USB Charger with 2 Rechargeable BatteriesFEATURES Recharge your Batteries in 4 8 hours using the Jaguar Electronics Battery Charger, based on charging AA batteries to approximately 90% of charge. Jaguar Electronics Ni MH batteries are designed to be rechargeable, which means they can be reused multiple times by recharging them. This feature makes them a cost effective and environmentally friendly alternative to single use disposable batteries. You can recharge 2pcs AA and AAA Ni MH batteries