This is a case for a Powerbank with a quick charge module from Aliexpress.
I used three battery cells in parallel from an old iPad as the battery pack. I think it was from an iPad 2nd Gen with a capacity of 6500mAh. The battery pack, powerbank module and the lid are with secured with hot glue.
Ipad_Battery_Powerbank.stl | 18.8KB | |
Ipad_Battery_Powerbank_Lid.stl | 8.8KB | |
Ipad_Battery_Powerbank_Pin.stl | 1.4KB |