u/zwiney

I can unlock them with OBI but as soon as they are on the charger they lock again after a couple of seconds.

Both of them have cell voltage difference of around 0.06V. Brand new 5Ah I bought just recently has 6 charge counts and cell voltage difference of 0.28V

One has 124 and the other one 136 charge counts.

Any ideas?

Both of them died after a workout on a DHR243