Mine were 8 gauge bought two around May 2022, they had around 30-40 charge cycles. One of them bit the dust, one cell got really high resistance (20-30m ohms) and would take forever to balance. Took it apart and found dirt was getting in the case and ruined the bottom cell in the pack. It was all dimpled up from the dirt getting between the plastic and bottom cell. Some of it was probably my fault for blowing them off with an air gun every time pushing the dirt in a little at a time. The second pack seems to be a little down on power from new so it's probably not far behind either. I thought I treated them pretty good, low voltage cutoff was 3.6v/cell. I never let them sit around charged longer than a couple of hours and always storage charged after they cooled off. Just bought two CNHL 6200 packs for less than one new Gens although they a soft pack/no case and have 10g wire. Hope those last just as long, hard to say.