The Energizer Recharge® Base Charger is our most affordable AA and AAA battery charger– and can have longer lives in certain applications. Just pair it with our Energizer Recharge®Universal or Power Plus AA or AAA batteries, and you’re good to go. Compact design. Fold-out plug. Charges 2 or 4 AA or AAA NiMH rechargeable batteries. World’s #1 recharge brand, according to market survey data.