The great outdoors is all well and good, but it's a bit lacking in the power department. So if you're a regular Ray Mears and want to make sure you have enough charge to book a room in the nearest luxury forest retreat for the night, you'll be needing some backup.
The Pebble portable battery charger has a huge 5000mAH capacity – four times the size of an iPhone 3G's battery – so should be enough to replenish your phone three or four times. The handy blue LED charge indicator makes sure you're never caught short and 5 different adaptors including mini USB, old-style Nokia and iPhone give you lots of options.
At a mere 132g it's lighter than a traditional stone (a feature we look for in all gadgets), and is eminently pocket friendly at just 13mm thick.
£49.99 from gadgetshop.com