dwcraig1

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.

If it were mine I'd use 19.5 wh and soft cell cutoff of 2.85 v

My first atty (Velocity) is a good candidate for checking but my 2nd one was a Merlin. The Merlin very well may have needed a good cleaning.

Call me skeptical, I tried on my SMY SDNA75 which tests out to 0.002 ohm with tool. With an atty with 0.07 resistance it came out to 0.002 -0.003 with above method. But with an atty with a higher resistance (0.58 ohms) I got something around 0.008 ohms. Of coarse there's always the possibility that I didn't do it correctly....these things happen here on occasion (many)

Karloz spike.......LOL Gone but not forgotten

Well here is what's going on, with all the 250 boards and all the 200 boards with 1.2 SP? software Atomizer Analyzer will not read below 0.007 ohms. So if it displays down to .007 then throws up a "?" it's .007 ohms or less. On the earlier firmware it wouldn't read below 0.002 ohms.

Early on I put heavy strand of copper through the posts of my Velocity, reading was 0.02 ohms. Using and old cartomizer or 510 adapter with it's end soldered together works well.

Just in case you need more ideas they can be found here: /topic/65540-topic/

Did you try it, the numbers mean nothing as far as what the temp really is. 275 -280 C should do it.