Opteka SP-10W Universal 10-WATT Triple-Panel Rapid Solar Charger with 2 USB Ports for 47st Photo Kindle Fire, Fire HD, Paperwhite, Ink Tablets 10-Watt Solar Charger Rapid Charging Panels for all Smartphones, Tablets & Most USB Devices Dual USB Charging Ports Bungee Loops to attach to your backpack for continuous charging while hiking, etc 2 Year Performance Guarantee