4 inch PVC Tube (vinyl fence post) Cap- used as LiPo battery box

This is an end cap sized to fit the 4" PVC fence posts you find sold in most US big box hardware stores. It has integrated 8-32 (M5 will probably fit too) nutraps used to mount the cap to the tube.

I designed this for use as a LiPo battery tube for my electric bikes and added mounts for Anderson PowerPoles and a DB25 (db25 is for cell level monitoring/balancing). I've included both the customized mount version as well as a "blank" cap that can be modified using the supplied sketchup file. There's also a "drill template" file that makes drilling holes in the side of the tube a lot easier.

The plastic bits holding the electronics (these are cell-log 8s, used to monitor battery voltages at the cell level) is another project entirely, I'll upload and link that one separately.