The product description Color: Black Adapter Type : UK Input Voltage : AC100-240V 50/60HZ Input Current: 0.8A Output: 21V, 1.5A Fit Voltage: 18V usually full charge the battery in 2-3 hours according to the capacity. Suitable for: suitable Charger 18V Li-ion Battery for RIDGID AEG L1830R L1815R BS18G B1817G BX18 CE, RoHS and FCC certified, 100% brand new and more smaller than originals so that can be taken to anywhere easily. 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.
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