The 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.