... ,overcharge,overload,short-circuit,lightning protection function6.long battery lifespan,more then 500 times recharge cycle 7.the product is tiny ... to DC Port Power Cable6*Adpapter (Mini USB, Micro USB, iPhone,Samsung, Nokia, Sony Ericsson connectors) Shipping Types:UPS,DHL,EMS ,FEDEX,ETC ... is Very initial.2.Price can be negotiable based on quantity,big quantity for big disdount.3.we will try our best ...