... 2.Dual output,4 LED indicator 3.Li-poly battery,safe, fast charge 4.FCC,CE,RoHS 4000mAh portable power bank with CE, FCC, ... .Charging for devices1)Using date line connect power bank with other digital equipment, then press power switch, the indicator light be shine that ... flashing, it means charging in normally2)Full charge, the five LED power indicator stop to flash and exhibit of lanterns long on. ...