18650 battery 12v

Hello friends ! I want to share with you the design of the battery that I did not find on this site. the battery has not yet been completed, but it will be 3s4p out of the 18650 lying around. printed pla with a nozzle 0.4 . the only case was not designed for the switch and the connector which was not available (the ones that I found turned out to be a little smaller) so I printed a couple of crutches to install them. and the voltmeter that was found was a little less. it turned out such a useful thing from the trash. Links to suitable components I left.

bms - http://ali.ski/zzMC-1

switch - http://ali.ski/mcEhh

voltmeter - http://ali.ski/iWhPJ

jack 5.5 - http://ali.ski/G6Vqv