Vivitar Overnight 4-Slot Battery Charger with 4 AA Rechargeable Ni-MH Batteries, 2100mAh Capacity

Vivitar BC-181 Battery Charger fits AA and AAA batteries. It fully charges in 16 hours. You can charge completely before first use. Subsequent charges will not reduce batteries capacity through memory buildup, unlike conventional NiCD batteries. This battery charges either 2 or 4 batteries at the time.