... achieve different shapes,Light weight: much lighter than Li-ion battery packing,Safety: Li-polymer use Solid Polymer Electrolyte Membrane (SPEM) material, which will not ... to connect computer USB port to charge,2)use a charger to charge, but we strongly suggest use good quality ... depends on mobile power bank capacity and input current of charger, normally a 5000mAh can be full within 3hours by computer ...