... travel, camping, emergency, promotion gift, advertising gift, eco-friendly products, outdoor, novel gift, business gift or other usaege.Main Technical ... 150 minsTime of being fully charged under sunlight(500W/ m²)60~70 hrsRated USB input voltageDC 5-5.2VLighting time ... 6VMax. current flux of being charged by solar(750W/ m²)≥20mAMax. load current500-650mAMain Parts Life-span LED lifespan50000 hoursSwitch ...