description:Battery:Brand New 100% functional li-ion battery.Uses the latest Lithium Ion battery technology， giving you the best performance possible compared to other battery technologies.When flight delays， power outages， longer-than-expected trips，you can't always recharge your phone when you'd like to. But with an extra battery on hand， you can always talk， type， and work as long as you need to.Our battery is sent out with little or no power， so please charge it for about 4 - 6 hours before using.Quantity: 2 PCSVoltage: 3.7VCapacity:1500mAhBattery Dock charger:US Plug with USB Charging PortQuantity: 1Color: blackCell type: Lithium IonSuper quality and definitely durable.charging stops once battery is full ，never overcharge keeps the performance and life of the batterymore convenience to interchange your standby batteries.Input : AC 100-240VOutput: DC 4.2 +\/- 0.05VCompatible with:  HTC Sensation 4G\/ EVO 3DPackage included :2 x Li-ion battery1 x Battery charger(US Plug ONLY)More Details: