FAQ: How to connect the small cylindrical cells together?
Answer: First never try to solder the contact to these cells. You are sure to damage the cell by over heating. Any temperature above 70*C is damaging to the cells! Without professional soldering equipment it is not possible to make the connection.
We suggest using the round-cell battery holders. The holders for big „D“ size cells can fit some of the cell. The contacts for the holders for the lithium cells can be purchased form a local electronics shop (check the German Conrad as an example).
See the photos of some possible solutions.