If grid-independent power for electronic gadgets is a worry, Ampware’s new iPhone case with integrated hand-crank and its universal generator can provide relief.
The devices develop 500 mA, and five minutes of cranking is good for three hours of battery life, according to the manufacturer. Crankbox can be used to charge any USB device. Retail prices are $29 (Crankbox) and $49 (Crankcase). Ampware, Baton Rouge, Louisiana, (562) 495-6045. getampware.com
This article originally appeared in the August 2015 issue.