This is a replacement WORX WA3732 WA3731 Charger for 18V and 20V Lithium Ion Batteries WA3520 and WA3525 WA3512.1 Only suitable for Worx 18V and 20V lithium batteries. Not for Worx Ni-MH and Ni-Cd pod style batteries ! Technical Specifications: Input Voltage: AC 100-240V Output Voltage: 21V / 1.5A Plug standard: UK Color: Black Fit for: Worx: WA3512, WA3512.1,WA3520, WA3525, WA3575, WA3731, WA3732, WA3742 Worx: WG180, WG175, WG170, WG166, WG165, WG163, WG160, WG157, WG156, WG155, WG155.5, WG154, WG153, WG152, WG151, WG151.5, WG151E, WG150, WG255, WG251, WG251.5, WG545, WG540, WG540.5, WG890, WG891, WU287, WU381, WX163 Charging Indicator LED light: Remain red: charging Remain green: full charged Flashing red: bad connected, high temperature or reverse connect .