Pain in the ass. A huge headache right out of the box.

These batteries have the incorrect circuitry to charge with Milwaukee chargers. The batteries themselves may be fine, but good luck charging on a Milwaukee brand charger. Since day 1, I have to insert the battery roughly 20 times in and out of the charger before they start charging. If anyone knows of an aftermarket charger or a way to rewire the Milwaukee charger, I’d love to hear about it. Currently looking for dead Milwaukee batteries to pull the circuitry and maybe fix these.

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