... :Packing/Family: Size:Shinco A6 VS iPhone: Li-polymer and Li-ion battery comparison:Flexible appearance: In Aluminum Foil Packing, ... different shapes,Light weight: much lighter than Li-ion battery packing,Safety: Li-polymer use Solid Polymer Electrolyte Membrane (SPEM) material, which ... devices and capacity of mobile power banks. 5000mAh Li-polymer Mobile Power Supply with 8.9mm slimmest design,5 ...