Tigra BikeCharge Weatherproof Bicycle Power Pack with 2600 mAh Li-ion Internal Battery Compatible with any iPhone, Galaxy, or any other smartphone make/model. Mountable to any bike tube. Rechargeable 2600 mAh Li-ion battery to Double Any Smartphone, Galaxy S3 / S4/ S5 and iPhone 4 / 4S / 5 / 6 / 6 Plus use time. 2X the use of tracking, fitness, mapping, GPS, and other cycling apps. Silicone-covered weatherproof body protected against rain, snow, sweat, dust, or dirt 360-degree rotation. Secure mounting. Attach or remove in seconds. Lightweight at less than 5 oz (145 g) Charges any smartphone, GPS, tablet, iPad, iPod, mp3, usb lights, cameras, batteries