AMPY Move Wearable USB Portable Motion Charger External Battery Pack for iPhone, Samsung & More &ndash; Black AMPY move is a world's smallest wearable motion charger that allows you to charge USB devices using motion Powerful and clean, AMPY move charges your devices as fast as any outlet all while using the clean energy you generate through movement 1 hour of vigorous exercise can provide up to 5 hours of standby smartphone battery Package includes: AMPY move motion charger, 1 USB connecting cable, instruction guide and warranty