This is an 18650 battery holder with built in battery contacts.
Battery contacts that I used which fits into the design: https://www.ebay.com/itm/185261843184
18650BatteryHolder.dwg | 615.7KB | |
18650BatteryHolder.dxf | 1.9MB | |
18650BatteryHolder.obj | 696.7KB | |
18650BatteryHolder.skp | 855.0KB | |
18650BatteryHolder.stl | 500.2KB |