FeaturesCharge batteries via USBCharge 1, 2, 3 or 4 AA or AAA batteries at a timeLEDs show which batteries are being charged4AA 1300mAh batteries and Micro USB cable includedReverse polarity, bad cell and short circuit protectionThe Infapower 4 Channel USB Home Battery Charger + 4 x AA 1300mAh Batteries can be used worldwide. It comes complete with 4AA 1300mAh Ready to Use rechargeable batteries. It will charge 1, 2, 3 or 4 AA or AAA batteries at a time. Micro USB cable included. LEDs show which batteries are being charged. For complete peace of mind, it features reverse polarity, bad cell and short circuit protection.Charging time for AA 1300mAh: 8 hours.