Recharge your NiMH AA and AAA batteries Charges up to 4 batteries in as little as 6 hours for rapid power replenishment. Duralock Power Preserve technology delivers optimal performance. Smart auto off turns the charger off when charging is complete. Duracell(R) Ion Speed Battery Charger For NiMH AA And AAA Batteries, CEF14 is one of many Chargers & Adapters available through Office Depot. Made by Duracell.