dwcraig1

You have it set correctly.

battery management on the board has gone south.

Yes, try Lost Vapes first lostvaperepair@gmail.com and if no luck there then open a ticket with Evolv. https://helpdesk.evolvapor.com/index.php?a=add&category=1

Re: Asmodeus I would start with the negative as it looks easier. Use volt meter, get one probe on the packs neg. battery and the other probe on the 510 housing and fire taking note of voltage....then when problem is noted go from pack neg. to sled neg. contact, fire, note voltage...ect Work your way through the path. Pay close attention to those battery contacts on the sled.

Generally when resistance increases more than it should is the result of a poor connection, wonky 510, atty posts connection to coil legs, adjustable atty 510 or just plain poor atty for TC. Just some examples of the top of my head.

If this problem only surfaces when the cells are below 3.6 volts unloaded it doesn't seem to be all that big of a problem (at least to me) It's really hard on the cells to discharge them all the way down, you might consider charging sooner. As the pack ages this is the kind of things that one starts to see, a new pack? Probably. You hitting the cell soft cutoff resulting in the "check battery". I don't recommend lowering that, 3.09 is good. Adjusting your curve and watt hours my get you closer to showing 0% when it's that low.

Draining uneven like that indicates a problem with the battery. If they drained evenly when still new then cell #3 has become weak. If new then cell #3 is either not been matched with the other 2 cells or the above. There isn't much power left once a Lipo hits 3.4 volts (unloaded)

When fully charged are all 3 cells at 4.2 volts?

I've been inside just two of them and it wasn't a problem.

Provided the batteries are of good quality and all connections (sled, soldering) are good there should be no problem down to 3.65 volts area. What cells are they. Tried others yet? % is to vague...need standing voltage and sagged voltage.

I'm having a hard time follwing. Is he hitting the cell soft cutoff?

Interesting: note on my snip my cell soft cutoff is 2.91. I was setting it to 2.85 and upon upload it would change to 2.91. I now set it to 2.8 and it stayed at 2.8. I hope the OP got it sorted

Check cell soft cutoff In device monitor check voltage drop under load (firing), see if one or both cells drop below cell soft cutoff. Make sure battery connection are clean, even if they look clean.

29 watt hours will put you pretty close. 2.9 volt cell soft cutoff

250. EScribe doesn't lie.

250 in 2 cell configuration voltage output.....6.2 volts max.

And if not plugged into computer? (error or no error)

@Damian, do you get the battery error message when it's plugged into a wall charger. Also just to be clear is this error only displaying when connected with data cable?

Have you tried using a different USB cable?

You should be good....PM sent

Against my better judgment I will post this, my friend bought a 3D printer and made this box for me. So I built it.

Time for a replacement board.

It looks to me that the battery is no good. Cells 1 & 3 show excessive sag under load.

Being the board has a hardware cutoff of 2.85 because it's designed for a LiPo. LiPo has mah rated between 3 volts ant 4.2 volts. A IMR round cell has it's mah rated between 2.5 volts and 4.2 volts. So with a 200/250 board the capacity between 2.5 and 2.85 volts isn't able to be used. What I do is subtract about 12% for what the calculator comes up with when using round cells. It's much easier on the cells to not use them to their lowest point.