Technical Specifications: Input: AC 100-240 V Output:21V / 1.5A Plug standard: UK Fit for: （Please search with "Ctrl+F" ) Milwaukee M18 48-11-1811, 48-11-1815, 48-11-1820, 48-11-1822 48-11-1828, 48-11-1840, 48-11-1841, 48-59-1850, 48-11-1850, 48-11-1852, 48-59-181,48-11-1890 982-2, 4932352071, 4932430063, XC M18, M18, M18B, M18B2, M18B4, M18BPD, M18BX, M18 2602-20, M18 2603-20, C18B, C18PD, C18ID, C18RAD-31, HD18HIWF, BIW38, M18BH-402C, M18BH-0, M18CID-202C, HD18PP2A, Li18 Charging Indicator LED light: Remain red: chargingRemain green: full charged 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.
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