Sometimes it's difficult to genuinely consider all the information.
I’ve just bought a PocketPower device from Gear4. It’s a rechargable power pack that can charge/power any of your USB devices. I bought it mainly to add some battery life to my iPod Video on long trips but I can also use it for my BlackBerry and mobile phone.
It comes with 4 rechargable AAA batteries but regular batteries can also be used. If using rechargables you can charge them in the device via the USB port on your PC/laptop. The device is light, compact and slips easily into my laptop bag.
Gear4 claim it will add up to 8 hours playback [...]
Source: Ant
In other news, someone was heard asking where can I get a free mp3 player and it was pointed out it may be possible.