PortaPow 4x AA/AAA USB Battery Charger and Power Bank
This battery pack uses AA batteries to power and charge your gadgets. It can be plugged into the power socket of your device just like a normal power adaptor. 4x mid price disposable AA batteries can fully charge a 4" smartphone, you will get less/more of a charge with smaller/bigger devices. Top quality 'lithium' disposables or high capacity rechargeable will give even better performance.Charge 1000s of Gadgets- Since the pack features a USB socket it can charge the thousands of devices which charge from a computer's USB socket including most iPhones, Satnavs, android smartphones from Samsung, HTC, etc. We cannot guarantee compatibility with all iPhones, tablets are not compatible since AA/AAA  batteries don't have enough power for them.  AAA batteries have low capacity and aren't designed to cope with the amount of power most devices need so we don't recommend using them to charge your devices.AA/AAA USB Battery Charging- The pack can charge 2 or 4 AA or AAA rechargeable batteries from a USB socket, simply press the button on the pack to switch between input and output modes. An LED will change colour to let you know when charging has finished, the pack will switch off automatically when the batteries are fully charged, and will auto detect non-rechargeable batteries.Efficient charging- It can fully charge a set of 4 AA 2500mAh batteries in 5 hours, and outputs 500mA, approximately half the speed of a typical mains charger but enough to charge a smartphone in 4 hours. We have tested higher output currents and found that AA batteries get hot so a lot of energy is lost as heat, 500mA provides the best balance of speed and efficiency.Batteries not included, weighs 75g. 118x75x26mm. 1 year guarantee.Box ContainsBattery PackCharger CableMicro USBMini USBApple 'Wide' ConnectorUser Guide