Powermonkey

Charge this Powermonkey up from an AC power outlet and then stash it in your pocket to use it later. This amazing little Powermonkey can retain a standby charge for up to 1 year. When your portable device runs out of juice, whether it is a cell phone, iPod, PSP, PDA, etc., simply connect it to the Powermonkey and power it up. Your portable device can then run for hours.

This good little Monkey is compatible with the majority of standard mobile phones including Motorola, Samsung, Nokia & Mini Nokia, Siemens & Sony Ericsson. The USB connector can also power up MP3 players, iPods and accessories, and PDAs. Retails for around $49.99