The ETON BOOST TURBINE ($60) is a portable charger useful when your device is low on juice. The portable power pack has a 2000 mAH lithium-ion battery pack, a durable aluminum body, an LED charge indicator, a Micro-USB DC input for use with standard phone chargers, and your choice of one of four exterior colors. To top it off, no electricity is needed! Just use wind up the turbine and generate some energy!