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This is a third-party bundle of two 18V 4.0Ah lithium-ion replacement batteries for Milwaukee M18 tools, plus a rapid charger that takes both M12 and M18 packs. The batteries match the original connector and voltage and add smart BMS protection against overcharge, with no memory effect. It suits owners with several M18 tools who want spare runtime and a second charger without buying Milwaukee-branded packs. Against genuine Milwaukee 4.0Ah XC packs, these are aftermarket cells with a one-year warranty, so expect shorter service life and no Milwaukee warranty coverage.
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Lowest price we've seen: $53.98 on Nov 14 at Amazon; highest $58.99 on Nov 4. Tracked across 2 stores since Nov 4.
Rated 4.8 out of 5 from 93 ratings, buyers mostly report the packs fit M18 tools and charge normally. Complaints center on the aftermarket nature and the single-bay charger.
This set includes two 18-volt, 4.0Ah lithium-ion replacement batteries for Milwaukee M18 tools, plus a charger for 12V to 18V Milwaukee lithium battery packs. The batteries are made to match the original connector and voltage. They have no memory effect.
The batteries have smart BMS safety protection, and an intelligent charging program protects against overcharging. The charger fits Milwaukee M12, M14 and M18 lithium battery packs. It charges one battery at a time, so M12 and M18 packs should not be charged together.
Fully charge each battery before first use. Store the batteries in a cool, dry place away from damp and direct sun, and don't leave them on the charger during storage. Keep the charger away from heat and metal accessories. Do not take the batteries apart, crush them, hit them, or put them in water or fire. Keep them away from children.
