MPB - Modular Power Block - Base + Powerbank module

The MPB (Modular Power Block) is the result of many iterations of a flexible, secure and portable case for my large 18650 Battery packs. This model is currently in Version 4. (The Preview image is of Version 3 and will be updated.) The battery lid on the bottom is held in by friction through the weight of the battery pack, allowing fast replacements.

All parts can be printed with a 0.6mm nozzle at 0.3mm layer height. 2 Walls recommended, 3 bottom/top layers. 15% Honeycomb infill was used during testing.
You know your printer best, adjust your settings as necessary. Tolerances for holes are tight.

Remixes and compatible modules are encouraged. Feedback, both positive and negative, is appreciated. Suggestions welcome.

The maximum battery size is 6x6 18650 cells with a 40x40 cooler attached to the front-facing BMS.

Assembly instructions are included in the PDF, as well as a more detailed Bill of materials with some non-sponsored links for purchasing.

Required materials (brief overview)

16 Threaded inserts M5

16 Screws M5x12

3S battery pack (min 5A discharge)

DC-DC Boost converter

Battery status indicator

Rectangular switch 19x12mm

USB PD charging module

Wires (Salvaged from PC Power supply used in example, AWG18?)

Hot glue

Other expansion modules for the MPB are:

100W Flashlight (Version 4)

Filament Pelletizer (Testing phase)

Desk-Fan (WIP)

Stereo speaker (WIP)

2-chanel Amplifier (WIP - Waiting for parts)