Charge Your Phone Just by Walking Around or Working Out


Gigaom

Yesterday I noted a portable battery charger that needs only 5 minutes to get enough juice for a full iPhone 5 charge and today I found one that’s a polar opposite: It takes almost all day just to top off this battery, which only provides another 3 hours of run-time for a phone. There’s one more big difference,  though. This device, dubbed the Ampy, doesn’t need to be plugged into a wall charger at all. Instead, it uses your own kinetic energy.

ampy in use

You carry or wear the small battery pack throughout the day. Take around 10,000 steps and you’ll fill up the battery inside the Ampy, which can then be used to recharge a phone over USB. If you run or cycle, just a 30 to 60 minute workout will do the same. Phones aren’t the only devices that can benefit from Ampy. The battery can recharge a smartwatch to run…

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