What if i buy battery replacement with shitty capacity, and solder

>>1098182
all ol cells have lost capacity. Lithium ions lose charge capacity just sitting there. The chemistry of the cell is inherently mechanically unstable.

Second, nearly all smart battery controllers have electronics that monitor aggressively for out of spec conditions. Disconnect a cell to replace it, and the controller will see that, mark the battery disabled/failed and blow a set of fuses intended to isolte the cells from the outside world. The blown fuses are permanent, and the only sources I've found for them are on Alibaba.

>>1098183
...and that's the the start of your worries.

In any case, you can do it, but you'll need expertise and possibly vendor-specific programming equipment to do a decent job.

>>1098183
>>1098184
Does the controller see different cells or just stop working forever if disconnected from any power from those cells?

>>1098185
it sees all the cells separately. On most, there's a disconnect sequence that will work, but it's different for different controllers. The other option is to use some resistors and set up a voltage divider bridge with an external power supply, and keep feeding the controller fake voltages while you transplant cells...

>>1098188
I bet that's risk. But cells doesn' need to be same voltage as old ones?

>>1098201
not exactly the same voltage-- they just need to be the same kind of cell.

Ideally, you'd reprogram the controller data to tell it the exact cell chemistry, but that's mostly to get the charge tracking exact (so the battery meter is accurate).

Ok thanks for answers. I guess im jewed and need new battery...cause driver is allready registered in my laptop.