Portable Solar Charger 20000mAh With 20LED PANEL POWEFUL EMERGENCY LIGHT , Dual USB Output,Weatherproof charger Please note that solar power bank can be charged by solar power upto 2000 mah in winter and 4000 mah in summer however you fully charge solar power bank by electricity solar should be in case of no power or emergency EXCELLENT GADGET IN EMERGENCY POWERFUL SOLAR PANEL WILL CHARGE IN VERY LITTLE SUN LIGHT IN YOUR ROOM PLEASE NOTE THE POWER BANK CHARGES UPTO 2000 MAH IN WINTER AND UPTO 4000 MAH IN SUMMER ON SOLAR POWER SOLAR POWER SHOULD BE USED IN EMERGENCY OTHERWISE WE RECOMMEND CHARGING TE POWER BANK B ELECTRIC POWER Main Features: With 20000mAh li-Polymer battery, which could charge most of all smartphone (iPhone, Samsung, HTC, Sony, Nokia etc.)/ iPod/ MP3/4 / digital camera. It can be fully charged under direct strong sunlight within 13 hours. It adopt intelligent chip, support overcharge / discharge / overload and short circuit protection. Grade 5 Waterproof to protect your solar charger when it is rainy. When you are in travel, it could hang on your backpack to suck up sunshine for charging. Dual Build-in USB outputs for charging your mobile phones at the same time. Super lights of LED torch when it is emergency.