qx7 3x 18650 case with original battery pads

thingiverse

To get started, use the original battery pad as is. Don't worry about soldering or cutting - it's designed for easy installation. Simply plug it in and go. If you need to elevate the pad, punch a hole in the positive pads to increase its height. A helpful tip: after making those holes, take a moment to flatten them slightly to eliminate any sharp edges. The 3D design files are included if you want to modify or print your own custom battery holder.