Email us when you have problems.Features:100% Brand new and high quality!Rechargeable battery with re/discharging protestion circuitLow reoccurring operation cist， Short -circuit and over-current protectionSafe and environmental friendlyPerfect for flashlight or electronic gadgetsKeep in a dry and cool place.Specifications:Capacity: 9900mAhVoltage: 3.7VChemistry: Li-ionColor: Yellow， RedSize: 63mm(Length) x 17mm(Dia.)Package Included:4pcs 3.7V 18650 9900mAh Li-ion Rechargeable BatteryPlease contact us freely if any problem!