1.Metal style protable battery pack,fashionable and simple design with anodic oxidation by Al;          2.With A-grade high-energy Li-ion battery cells inside by Samsung; 3.With A-grade chipset of IC and MCU,so there is high enery conversion efficiency to 96%;4.Battery cycles life is more than 500 times;    5.Led torch function,with high light energy saving;6.Led light and battery level indicators;    7.Internal protection functions for overcharge,overdischarge,short circuit and over temperature.