USBatteries

Knowing how flaky built-in MP3 player batteries can be I decided to buy one which runs on replaceable AA power. This way the whole device wouldn't have to be trashed if the battery alone gave up the ghost.

With USBCells you can have the best of both worlds. Flip back the cover on these 1300mah AA NiMH batteries and you'll find a plug which can be inserted into a standard USB port to recharge them - in other words, they're a battery and charger rolled into one compact package. The process takes 5 hours; you'll know when they're ready to rumble because the LED light will switch off.
USBCells cost £12.99 for a pack of two including VAT and delivery.