Battery: Type: Li-ion Cell Voltage: 20V Capacity: 6000mAh Colour: Black UK/EU Charger: Fit Voltage: 18V Type: Li-ion Batteries Only Input Voltage: AC 100-240V Output Voltage: 21V/1.5A Input Current: 0.8A Output Current: 1.5A Replace: Worx WA3551.1 WA3551WA3516 WA3549.1 Fit for: Worx WG169,WG169E,WG259, WG259E.9, WG549, WG549E.5, WG549E.9, WX166, WX166.31, WX372, WX390, WX390.1, WX390.31, WX523, WX523.9, WX678, WX678 Rockwell RK1806K2, RK2853K2, RK2859, RK2868K2 Worx WG154E, WG160E, WG255E, WG329E, WG329E.9, WG894E, WG894E.5 Worx WX090, WX167, WX170, WX175, WX292,WX373, WG160E.5, WG255E.5, WX166, WX166.1, WX166.2, WX166.3, WX166.4, WX166.5, WX372.1, WX372.2 Notes: It's recommended that the battery should be fully charged and discharged 3 times after you receive the battery.