Handy little battery back to recharge phones satnavs etc, bargain for a £10, comes with mains charger with a mini USB adapter which you'd pay £5 for anyway.
Compatible with the majority of standard mobile phones
USB connector powers up iPods and accessories, MP3 players, PDAs, digital cameras, Bluetooth® headsets and many more digital devices
Small, lightweight design - fits in your pocket
Reusable reserve power pack - no batteries required
Mains power supply included
LED power gaugehttp://www.maplin.co.uk/Module.aspx?ModuleNo=222614