Powerchimp, price: £25, from: www.powertraveller.com
Need some extra juice for a mobile device but find yourself stuck in an airport or camping somewhere remote or cycling from Land’s End to John O’Groats? You need a Powerchimp. Its AA batteries will recharge your phone, iPod, PSP or whatever, then you can recharge its batteries (or any other rechargeable AAs) by plugging it into your computer’s USB port later. Clever, huh?