Often forget to take your mobile charger with you? The Nipper is the world's smallest, and will easily fit on your keyring.
There is a caveat, though. It's powered using AA batteries, so you'll need to ensure you have some with you. However, considering they're available on every high street in the UK, getting hold of some shouldn't be a problem.
Measuring 17 x 17 x 17mm, the Nipper is about the size of a sugar cube. And it weighs only 10g, so you won't notice it in your pocket.
To charge, open up the Nipper and place two AA batteries between its magnets. Then connect it to your phone to power up your device.
It works with any handset that uses a micro-USB connector, which is pretty much covers every Android, BlackBerry and Windows phone around. It's designed for emergency use: it will charge a modern smartphone such as the Samsung Galaxy S6 up to 17 per cent, so don't expect to get another day's use out of it.
A version for the iPhone is coming soon.
One of the advantages of the Nipper is that the unit itself doesn't need to be charged. We've found ourselves running low on battery many a time, only to realise our charger has run out of juice.
The Nipper is also pretty cheap. A pledge of just £12 nabs you an early bird version; £20 buys you a premium Nipper, featuring leather straps and gold-plated magnets. It's passed its funding goal and will ship in April next year.