Summary I designed it to re-use some old plastic "briefcase" I had around. This battery cover got emplacements for: 1 battery tester and low voltage alarm (common in RC hobby) 1 switch 1 fuse hodler 4 male 5.5 2.1 2 USB (recycled from old computer) 1 temperature sensor (cheap one) This was originally for a RC field Battery Project with 9 * 18650 batteries from old laptop. A video resume of the project is available there : https://youtu.be/zUQxXmT4EnU If you like my work and want to support me, you can be my patreon ;) https://www.patreon.com/myke974 Print Settings Printer Brand: RepRap Printer: Prusa i3 P802M Rafts: Yes Supports: Yes Infill: 50 How I Designed This