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.