I have had 2 20volt batteries go bad. Now my second flexvolt battery went. I bought 10 Dewalt batteries and 4 have now crapped out. The first three under warranty the latest is 2016. I Will call Dewalt tomorrow and beg. I have 26 5 amp Makita batteries and only one has gone bad under warranty and none after. Dewalt is just not as reliable in my ACTUAL experience. I am bummed because I like some of dewalts offerings like the flexvolt compressor and power station, but the batteries just do not hold up. Furthermore all my hand tools, hammer drills, impacts, skil saws, and sawzalls are makitas and I beat those tools relative to the Dewalt tools which are the compressor, power station, metal nibler and other light use tools