Product Description: USB-powered device and countless 3-6.0 V DC devices without a wall outlet, anywhere! Being stuck without power for portable devices is no longer an issue. With the Tanker you bring the juice with you in your pocket! Now you can power and charge your iPod or PDA on those long airline flights multiple times and stay entertained. You can also power high-drain devices in outdoor activities where the use of outlet power is clearly not an option. Now your G.P.S. and/or the PDA Bluetooth linked to it can be reliably used for navigation while hiking, camping, mountain biking etc. The reliability of batteries makes it a far more secure solution than slow-to-charge solar chargers. The Tanker can use either regular batteries or rechargeable ones - which it can recharge by itself in a wall outlet! The fact that standard AA are used is a great bonus when you are travelling for multiple days since you can stock up on inexpensive bulk batteries or multiple rechargeable batteries and still be powered while solar users are blacked out. Tanker provides from 3-6.0 V DC for anything from your PDA, cell, to your iPod. If it can be powered by USB it can run off the Tanker. Just use the USB cable appropriate to your device. The device uses a fold-away AC plug and its transformer is universally adapted to work from wall power in any country. Apart from charging the batteries, you also get live power to the USB outlet while charging. So you can use the Tanker as an all-in-one charger! While you're charging your iPod, you are also charging the batteries for reserve power later on. As long as you have USB cables fitting all your devices you will not need to bring seperate chargers for each one! The unit runs on 4 AA 1600 MaH batteries (included) and has indicator lights to show charging state and low battery once running. The charging mode can also be set to recondition older rechargeable batteries to full order through a special cycle set on the back switch.