About this item. Charges 2 or 4 AA or AAA NiMH rechargeable batteries at once (4 AA batteries included). State of the art Charge Status Indicator system visually and audibly alerts on your batterie's charge levels. Get a full charge in 4 hours with the rapid charging power of Recharge Pro (times may vary by NiMH battery). Auto safety shut off and overcharge protection features prevent damage from overcharging, helping to maximize battery life. Built in, fold out plug design allows you to easily store the Pro Charger Battery Charger when not in use. Compatible with all AAA and AA NiMH rechargeable batteries (Energizer Recharge batteries recomillimeterended). Note: For any troubleshooting steps please refer product user manual in technical Conveniently charges 4 AA or AAA NiMH rechargeable batteries at the same time. 3-5 hour charge time with auto shut off to prevent overcharging and battery damage. Manufactured in China. The charger is equipped with audio and visual alerts. A red light means that charging has started, and you will hear an audible beep when charging begins. A yellow light appears when charging is 50 percent complete and charging is continuing. A green light means charging is complete, and the batteries are 100 percent full. You will hear an audible beep upon completion. If a bad battery is detected, a red X will illuminate, and the charger generates a repetitive audible beep upon detection. Audio and visual alerts:Red light - Charging has started; audible beep when charging begins. Yellow light - Charging is 50% complete and charging. Green light - Charge is complete and batteries are 100% full; audible beep upon completion. Bad Battery Detection Alert - If a bad battery is detected a red x will illuminate; repetitive audible beep upon detection.