20 Most Recent Makita 2 Bl1830 18v Battery,dc18ra Charger Lxt Fr Drill - Page 2 Questions & Answers

Rechargeable batteries are almost never worth rebuilding and never last very long when they are. In some cases, Makita being one, if the circuit board in the battery detects something wrong with the battery, it 'bricks' the battery. This is not resettable and the battery will not charge on a Makita charger. I'd be looking to get my money back from the repairman since his rebuild didn't take.

If the charge count on the batteries is under 300, Makita will replace them. Makita has a known defect in this battery that causes the battery to shut down before it is dead. So as of now they are exchanging ones with low use.If they are truly defective and makita won't replace, you have to open them, find the dead cell or blown fuse, and replace. Search youtube makita battery for a video on repairing this battery. But once the red and green lights on the charger flash, the the battery can't be charged on a Makita charger -- it's been locked. So use a third party charger.

I had the exact same problem. I ordered the ZNR V10 241U part from Dija Key. They are around 36 cents if you buy 10 of them. I cut the old one out and soldered the new one in. I changed the fuse over to an automotive one so the fuse is easier to obtain. I plugged it in and charger works fine.What happens is a voltage spike either low or high gets recieved by the charger. The fuse appears to be slow blowing and does not stop the spike in time. The spike is stopped by the varactor surge supresser. In doing so, it saves the circuit board so all you have to replace is the fuse and the surge surprsser.

Yep, not the batteries, mine is doing the same thing but my second charger works fine with the same batteries

Maybe there is something wrong with the charger itself. If you have a friend that has the same drill try to charge the battery on his charger.