I just burned my board

[MarkHaysHarris777]

Another way of saying what's going on with the 5v|Batt jumper is that the only way for a 3.7 volt lipo BATT to provide 5v for the output pins and for the usb is to generate it ( dc-dc ) with regulated conversion. I leave my BATTs plugged in and I leave the jumper in the Batt setting, so that my 5v outputs are being generated ... when I removed the 5v DCIN from the euler bus the transfer is seamless;  the fan keeps running, the usb keeps running, and the 5v outputs to the LED lab are always on...  I don't allow the BATT to go below 2-30 % and then I plug in the DCIN.