Keep your essential devices running at maximum performance with this Energizer Recharge Maxi Charger for NiMH Rechargeable AA and AAA Batteries. It charges two or four AA or AAA NiMH rechargeable batteries at once. Complete with four AA batteries, it delivers a full charge in five hours and features a large, easy-to-read LED screen that displays charge status (red = charging, green = ready-to-go). Its Delta V feature shuts off charging to protect your batteries from overcharging. Compatible with all AAA or AA NiMH rechargeable batteries.