[Elecraft] KXBT2 fault

[Grant La Delle]

Hi all, my Tenergy KXBT2 battery is about 3 years old and I have been charging it every few months with the recommended Tenergy charger. The green light on the charger illuminates soon each time.

However, testing the battery now with a 12v 21 watt car globe, it is only lasting about 20 minutes, so it looks like maybe 1 or 2 cells are dead? I have deep cycled the battery several times, and continuously charged for four days, to no avail.

Has anyone attempted a repack with new cells using the old pcb please?

Be well, Grant. vk2gel.