18650 3S switchable charger box

Box with an switch for 18650 battery charging devices (based on the accumulator holders I developed: https://www.thingiverse.com/thing:6686466 ).

Have 4-position fan speed switch from AliExpress. As described, this switch can work at a current of more than 10 A)))), - it really looks reliable and, I think, can withstand (for a short time) values close to those stated.

It should be mind that:
1. It is best to solder the contacts to the switch
2. In the one position ("4" - OFF), the switch closes contacts 1 and 3, which can lead to a fire danger for the battery if they are installed in the holders - best to block this switch position immediately

I develop a mixed type first for myself, where the 1S battery holders (regular and protected) are connected in parallel. This is not for parallel charging of batteries, but I have a pair of 18650 batteries with protection and sometimes I charge them one at a time.

The case is assembled with 2.5*10 type screws

----------------