Made for this product: https://s.click.aliexpress.com/e/_c30XjcAX

This is a custom-designed 3D-printed enclosure for a dual-slot 18650 Lithium Battery Capacity Tester. The design securely holds the tester PCB, two 18650 battery holders, the power connector, and the load resistors in a compact and robust housing.

The enclosure provides easy access to the color display and control buttons while keeping all components neatly organized and protected. Ventilation around the power resistors helps dissipate heat during long discharge tests.