BMS Switch LED Voltage

I encountered something today, that I had not with dozens of BMS prior to this, though most without LED. The LED output which is supposed to be 12V was actually supplying battery voltage to the LED. I managed to spot the switch start melting a plastic bag it was laying on and turned it off.

Those with BMS with eswitch and LED have you checked the voltage being supplied to the LED?

Is that a bestech ?

It’s from here, though I didn’t get it there, this is supposedly the same model, though it looks slightly different http://www.lws-pcm.com/en/product/product237.html

Hmm I did just notice the diagram there says “voltage level” , the diagram I got with it said “switch led”

I see it has connection for a switch and a battery meter. did you connect an led where the battery meter goes?

Lol yeah it seems the doc I got with it was crap lol