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Case for Racebox Micro

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This is a case for the Racebox Micro that offers greater battery life than the Mini S.

Updated at source: Apr 23, 2026

Model information

Warning: Assembly requires basic soldering and electrical skills.

Features:

Size of 78 x 63 x 24 mm (which is smaller than the [Racebox Mini S](https://www.racebox.pro/products/racebox-mini-s) at 82 x 72 x 25 mm)
Houses two 16340 battery cells. When using 2x 900mAh, it totals 1800 mAH. This is roughly 50% more energy compared to the Racebox Mini S.
With 1800 mAh, I estimate about 1.5 years of standby time, or 30 hours active time.
Improved water resistance: The default build already holds back rain, but you can seal the edge with tape to improve water resistance.
Close with 2 screws, or use tie wrap(s). Or both.
Holes on the side can be used for safety wire and/or zip ties that go around the body. You can use 2 holes for a zip tie and 1 or 2 for safety wire.

Downsides over alternatives:

No USB connector for easy charging. You have to either open with 2 screws or cut zip ties if you used those.
Alternatively, when using the case in a car, the lid might not need fastening,

Hardware:

2x M3 heat insert (3mm thread, 5mm length, 4mm diameter)
2x M3x8 screw: socket cap or button head both fit
Double-sided tape (e.g. 3M VHB)
4x 18650 leaf spring battery contact for 18650 cells ([example](https://nl.aliexpress.com/item/4000953728880.html))

Tools:

Assembly:

Put the two M3 heat inserts in the lid
Place 2 thin strips of VHB tape on the Racebox Micro (e.g. 2-3 mm wide, but across the width of the Racebox) and place the Racebox Micro in the bottom part of the case.
Solder the contacts of the batteries so that the batteries are connected in series.

Warnings:

When it rains hard, place tape across the side to seal it. Just in case.
If you buy 16340 cells with a USB socket, don't charge them while they are inside the case.