Warranty 1 Year Voltage 14.4V Battery Type External Cells 4 Cell Cell Type Li-ion 18650 cell Battery Capacity 2200mAh Watt-Hour 29Wh Compatible with A450 A550 A552E D450L D452C D551E D552C E450C E550C F450 F550 F550LNV F552 K450 K550 K552E P450 P550 P552E Pro450 Pro550 R409 R510 X450 X452 X550 X552C Y481C Y481V Y482C Y482E Y581C Y581L Y582C