Having embraced the DeWALT cordless tool family, I own more than twenty tools and half as many batteries. The relatively new one pictured above is a 60V 6AH FlexVolt which no longer takes a charge. Given it costs north of $120, I decided it was worth trying to repair rather than sending it to the dump. After opening it up, I identified a single defective cell of the 15 in this pack. I then carefully carved away the plastic holding it in place and removed the spot-welded tab from both sides. It slid out easily and I ordered a replacement cell on Amazon for $4. It should be here in a week and I will report out if the patient survives the surgery.