Clip the unit to the outside of a backpack to get charging on the go. It’s perfect as back-up power or in emergencies,waterproof, dustproof, dirtproof, crushproof and drop-tested to withstand the abuses of the wild; the perfect partner for your favorite outdoor adventures, 10000mAh provide enough juice to charge your phone for long time ! Keep your gadgets ,phones, cameras, headlamps, and GPS devices,powered up on road trips, hikes, and travel adventures. No more worries about staying connectedFind your way to your next branded giveaway,Add your school, sports team, organizational or company logo or message through our signature silkscreen method to customize.