Compatible with:Sprint HTC EVO 4GSprint HTC HeroHTC IncredibleHTC Touch Pro2HTC SnapDOUBLES YOUR BATTERY LIFE!!! Battery:Extend your talk time on your Evo with 2 new high quality batteries! Easily swap your battery when your charge is low.  Never run out power again when at work, school, vacation or out with friends. The battery has an integrated microchip to prevent overcharging and lengthens battery life.  Excellent quality at a great price.  Plus ships fast!Specs:Cell type: Lithium-ionVoltage: 3.7VCapacity: 1500mahFits original back coverQuantity: 2ChargerWe offer the complete battery charging solution.  The charger will keep your exta batteries charged for when you need them.  The smart led shows charging status.  Quick charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock.  Charger is designed with a folding A/C plug that charges your cellphone battery anywhere in the worldSpecs:A/C power supply input voltage: AC100V~240VOutput voltage: DC 4.2V 350mA ~50mAQuantity: 1