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Introducing Fuel, the world’s smallest smartphone charger

Measuring just 1.3 by 0.9in, the Devotec Fuel Micro Charger is designed to help you out when your smartphone's charge goes south at an inopportune moment.

The device integrates flexible pcbs and a 220mAmp Li-ion battery, which Devotec says give users around 20 to 30 minutes extra talk time. Three leds placed on the outside of the case let you know when the Fuel is turned on, fully charged, or charging. The device can be charged from the supplied cable or any AC micro usb wall plug, and lasts for about a month before needing to be topped up. Devotec's Kickstarter campaign launched just over a week ago and the team has already exceeded its $20,000 (approx. £13,200) goal. The final version is expected to cost around $25 (£17).