Found a compact powerbank module on aliexpress. its a smaller 22.5w version compared to the rest. As I wanted a more pocketable powerbank with more amps.
Installation instructions:
installation is pretty straight forward. there is a top plate, body base, 2 bottom plates and a pin. case is designed for either 3 - 18650, side by side or 2 - 3.7v lithium ion pouch batteries, back to back. Only trick is getting the pin on the side in. Pretty much insert the pin from in inside of the case. Then with your thumb, hold the pin place while sliding the top plate down. I tried my best taking picture of this process. Also I stuck on a (pi3)copper plate on the charging coil to help dissipate heat, just in case. As it ran a little hot when doing my tests. Also I used tiny self tapping screws to secure plates in place as I already had those on hand or if you don't have any can just glue them in place.
parts needed:
1qty 22.5w powerbank module
4qty m1.2*3 self tapping screws.
3qty 18650 batteries
or
2qty 3.7v pouch type batteries.
screws: https://www.amazon.com/gp/product/B07GKXMSVR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
| 8mm-pin.stl | 24.9KB | |
| pd_charger_case_22.5w_18650_bottom.stl | 64.7KB | |
| pd_charger_case_22.5w_base.stl | 450.3KB | |
| pd_charger_case_22.5w_bottom.stl | 44.6KB | |
| pd_charger_case_22.5w_top.stl | 287.7KB |
