Johnny93

I know this is an old thread, but I'm desperate here. I have a 9AH Flexvolt battery here that just will not work in 18v (20v) or 54v (60v) tools. It wouldn't charge on any of my Dewalt chargers so I took off the covers and individually balanced all 15 cells to 4.1v. The pack is completely balanced to 4.1v per cell, or 20.5v per 5S pack. The thermistor reads 12K ohm between B+ and TH, the same as all my working batteries, and 12v between B- and C3, again like my working batteries. I've even had the battery sitting on the charger for 24hrs to "reset" the battery as some videos/forums suggest. What am I missing? I'm in Australia and current pricing is to high to "just replace it" It's a 2017 build date and well out or warranty, again, Dewalt will NOT just replace it. No physical cell damage is visible, nor have a submersed the battery in water. None of the physical fuses have been blown/melted, I am getting voltages on C1 through to C4 as well as between B+ and B-