Technical Specifications: Adapter Type:UK Input Voltage:AC100-240V 50/60HZ Input Current:0.8A Output Voltage:42V Output Current:0.7A Fit Voltage:36V Suitable for:GreenWorks Li-ion Batteries Color:Black Fit for:（Please search with "Ctrl+F" ） GreenWorks: 29472,29282,2601102,24252,29462,29302, GreenWorks:20302,2601402,21332,24102,29463,20292,20672,24322,25302,25322,21242 Charging Indicator LED light: Remain Red: charging Remain Green: full charged Flashing red: bad connected, high temperature or reverse connect If your battery getting too old and cant take a charge or can not run after charge, then you need a new battery, not charger problem. Note: Indoor use only Only suitable for Li-ion batteries Please make sure the charger connectors are same as battery before using.