Power bank for 3 18650 Li-ion batteries

Power bank for 3 18650 Li-ion batteries Print Standard 0.4 mm nozzle with 0.2 layer hight, without x/y compensation in my case. Support(organic) is needed only for case_top.stl Components QC4+ I'm not sure about name, Two directional charger, seems like it is working fine , but have problems with current more than 2A. Noticed over temperature during the fast charge, be care full! https://pl.aliexpress.com/item/1005008090117494.html?spm=a2g0o.order_list.order_list_main.75.12b91c24PqdKLl&gatewayAdapt=glo2pol 12x12mm AA contact pair something like this used https://www.amazon.com/20Pairs-Battery-Negative-Positive-Conversion/dp/B09DSQ6Q51?crid=1E2M630LP1PKN&dib=eyJ2IjoiMSJ9.btalTzodsqosZ375Rv2C9xkNHkCq_8czXPpPGquyeeyTzD4jpkJ7650GOSJUd4kxMV6iB-uqRwNZfspGGtHB0DvoYdfU09Abaw4aWx789NE7EJtRMn0b6J1Ip8bLJG9fRn5oNlUiwQDsjcuxm6RYXKgE-VBEsTsSlT5cLTNylWmn7EHfb4jRO8mRKpRzpFcE7guOl-4nff-NevrwgPHh08EfYwPb6ZC-RzQLvAs5KMc.vgZa1D0w3qiXjCQaaIzjc51kQMouc6vWkv4D1PIwBYw&dib_tag=se&keywords=12+12+mm+aa&qid=1772829904&sprefix=12+12+mm+aa%2Caps%2C254&sr=8-10 Files case_bottom.stl case_top.stl (board holder, two wires from bottom and top goes here) insert_bottom.stl (connectors for "+" should be placed here and soldered together to wire) insert_top.stl (connectors for "-" should be placed here and soldered together to wire)