I have a problem different from anything I read on Google. I have a M18 XC 5.0 that I purchased about 2-1/2 years. I hadn’t needed it right away so it sat in my drawer for about a year. I took it out of the package and put it onto the charger and worked GREAT for about 6 months. My problem is, the battery indicator light shows fully charged however, when I put it onto the tool, NOTHING, no power. (DEAD). I put it back onto the charger and it says it’s fully charged (GREEN). I haven’t done anything with the battery since today (about 6 months later). I watched a lot of videos about testing volts so, I opened it up only to find out according to my multi meter and videos I watched, it’s fully charged and all the battery testing confirms there is nothing wrong with it. I thought it might be my charger however, I do have a second battery and it works flawlessly on the charger and on the same tool. If I take a positive and negative from that battery and run a test light, Lots of power. I put my multi meter over the other 3 connectors on the battery and it tests the same as the good battery fully charged. While I had the battery apart, I couldn’t see any corrosion or bent tabs where it connects to the tool. All batteries inside test at 4.00 to 4.02 and the main test at 20.04. I put back on the top cover and I get 20.04 however I can’t get power to my tool. Other battery works fine on my tool
