The Energizer Maxi Charger with 4x 1300mAh Rechargeable AA Batteries is a hard-working rechargeable battery charger that gets the job done while offering conveniences like a charging status indicator and safety shut-off. Easy-to-read LED displays charging status: Red = Charging, Green = Good to Go! Bad battery indicator light Overcharge protection limits battery damage from overcharging Automatic safety shut-off when charge is complete Recharges 2 or 4 AA or AAA NiMH rechargeable batteries in 5 hours