... Convenient easy to use, high capacityUse USB cable to charge power crystalQuality: 12 months warranty; CE, RoHS, FCC certififiedComply ... battery life, energy saving and environmental protectionPrecise LED light power indication, slow flashing shows discharging statusSafety:Lithium-ion ... . Mini AC-DC adapter---can charge PS-3800 through power socket;B. USB cable (for both charging and discharging)---can ...