Hand Crank Is a Backup for Your Backup Battery

Eton has released a series of backup batteries that come with their own backup solution for when the initial charge runs out. The BoostTurbine Series come equipped with a hand crank that will let you generate backup power by hand.

Source: http://www.wired.com/gadgetlab/2012/10/boostturbine2000-is-a-backup-generator-for-your-phone/

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