Hello, Sorry for the late reply. for the automatically shuts down: 1/Remove all jumper cap, 2/Remove all 18650 battery 3/Place 18650 battery again and wait a few seconds before testing. 4/Please check and confirm if other device occupy the GPIO with X728.

I noticed your steps, please do not supply power through the USB-C port of the RPi.

If your x728 is V1.2 version; Please check if enable the ASD function (shorted the ASD header), if you enable the ASD function, please make sure your operation is right: first, place the battery into the battery holder, insert the jumper to ASD header after 3 seconds,this is very important!!

Still not find out the issue, please attach a video to contact us show more details.