My bms wont charge help me

Could be a bad batch. Did you check for shorts? Is the e switch working?

I use the D596B. It’s 80A I have the li-ion 10s version its the only one out of 3 that I ordered that doesn’t work when I test it. But its the eswotch that won’t turn it on. Still I see the 8.7volt current running thru it when I connect the leads.