Now you can solder the charge logic, cutting of the wires to the smallest possible length. Be very gentle with the pcb. Also check if the position of the connector of charge logic matches the gap in the case.

The last step is re-assembling the battery pack. Don't use to much force when reinserting the cells. If there isn't enough space, it simply will not fit and the charge logic will probably break. You will have to check where the bottlenecks exactly are. Unfortunately the case cannot be restored in its original shape so you have to use your imagination for this. I used scotch tape, which isn't probably the best solution, but it did the job for me.

I charged the batteries for the first time in the open air, as I didn't know what would happen. Luckily, everything is okay. When booting my Linux operating system, the capacity wouldn't first exceed 74% but gradually went all the way up to 99%. Linux reports the battery life starting at over 1000 minutes, but almost immediately drops to about 280 minutes, which is over 4 hours, and again quite pleasant to work with.

1. Introduction
2. What you need
3. Opening the old battery pack
4. Soldering the cells
5. Reassembling the battery pack

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