Challenge ELECTRO: battery holder

Last updated: 30 October 2026

The battery is about 48.5 × 26.5 × 17.5 mm.

Want to see every step with screenshots? Follow the build guide for the battery holder.

Steps

1. Drag a Box onto the workplane. Make it 54 mm long, 32 mm wide and 21 mm high. This is the outer shell: the battery plus 1.5 mm clearance and 2 mm walls.
2. Drag a second Box and set it to Hole: 50 × 28 × 20 mm. Centre it on the first box with Align. Then raise it so its bottom is 2 mm above the workplane. That is the floor. Its top sticks out 1 mm, so the holder is open at the top.
3. Drag a small Box, set it to Hole and make it 8 × 6 × 6 mm. Put it in one short wall with its bottom at 2 mm, so a cable can exit.
4. Select everything and click Group. Check from the side that the floor is closed.
5. Add your name as bold Text with a height of 1 mm, on the outside of a long wall.

Success

The battery fits, the floor stays closed and the cable can exit.

Stretch ideas

A lid of 54 × 32 × 2 mm with a 5.2 mm Hole for a 5 mm LED.