Ampy is a wearable device that transfers kinetic energy into power for your phone. The average city dweller’s 10,000 steps is enough for 3 hours of charge on a smartphone or 24 hours for something smaller like a watch. Need a little extra motivation to get in those daily steps? • This Wearable Gadget Turns Your Footsteps Into Battery Life For Your Phone | Co.Exist
(Image credits: Ampy)
