How many time you find yourself looking for wall power plug, when your smartphone battery is running low? I guess the answer is "very often". That's reason why we need a self-powered energy generator like Boost Turbine from Eton. Boost Turbine 2000 enables you to charge your mobile device anytime, anywhere. The big deal is, it contains a rechargeable built-in hand turbine power generator, in one minute of cranking it can produce enough power through a USB port to your device for a 4 minutes call or a few critical texts, no electricity required. When fully charged, Boost Turbine 2000 fully charges most smartphones. This portable power pack features a 2000 mAH lithium-ion battery pack, a tough but lightweight aluminum body and with its sleek and elegant design, an LED charge indicator, a Micro-USB DC input for use with standard phone chargers, and your choice of one of four exterior colors.