Shenzhen Green Energy Tech Co., Limited is specialized in researching, designing, manufacturing and exporting rechargeable Li-ion/Li-polymer/NiMH battery packs as well as battery related products such as Portable Power Bank, and Battery PCM We insist that good quality level of the battery pack depends on the cell, protection circuit and strict quality control process. Green Energy contracts with SANYO, SAMSUNG, MAXCELL, PANASONIC, BAK, B&K and AE Energy etc.. to be our cell supplier partner, we also distribute these brand cells.- Li-ion cells and battery packs (using Brand New and Grade A lithium ion cells, at least one year Warranty)- Li-polymer cells and battery packs (Lithium polymer battery is known by its flexible size, high capacity, high drain rate and no explosion performance.)