I have two US3000's. The one had a heavily swollen cell which I managed to remove by cutting it out with a side cutter as I could not get it out with just soldering it out. Now on the other US3000 there are some cells which overvoltage when charging before it reaches full charge. There is one cell in each of the three packs inside the battery which are problematic. I tried swopping the packs between the two batteries. The only option left is to try and remove (de-solder) the problematic cells and swap with ones that are in a better state until I have a working US3000. At least know which ones need to be removed, as it can easily be identified with Batteryview.

The swollen cell that I had to cut out, I first tried desoldering, but it seems those connections (tabs) of the cells are bend back and it is not just a simple process of applying heat and removing.

Has anyone done it? Any suggestions to make it easier? Could be that I need to apply more heat, but it seems dangerous to apply heat at the cell connections.

Hi Jacques,

I have an almost identical problem. two US3000s that stopped working (I suspect a power surge via the earth). I'd be interested in having then repaired. Haven't been able to find a repairer yet.