Battery Problem

[KevyFenty]

 I'm new to modding and I am messing with the DNA75. I have it wired up in parallel with fresh batteries (VTC4) and it keeps showing check battery. I have checked continuity throughout the board and the board is getting the true 4.2v. Atty side it shows maybe .1 Volts. I have read that there is a fuse in the DNA200 that would blow, causing a similar problem, But I have also read that the DNA 75 does not have this fuse. That being said, I bought the board in working condition in a moonshot box and I de-soldered the connections and re-soldered based on the Evolv website. 
Not sure where to go from here. 
Did I fry something?

[VapingBad]

Could be poor battery connection causing an excessive voltage sag under load, you should be able to see that firing while connected to Device Monitor.

[KevyFenty]

The device monitor shows nothing all, it cannot read the battery. And like I mentioned, the board is getting proper voltage. 

[VapingBad]

So Battery - Pack is 0.0 V in Device Monitor?

[KevyFenty]

That is correct.

[VapingBad]

I have never seen that before, maybe someone else can shed some light on it.

[KevyFenty]

I made sure it wasn't in lipo mode, check thresholds and for draw, can't find anything out of the ordinary

[VapingBad]

The only thing I can thing of is it is the wrong way round.

[KevyFenty]

I even tried switching connections around! Maybe something fried somewhere. That's my only thought

[Spector NS5 RD]

see if you have voltage after the reverse battery protection mosfet. (the pic below should look familiar to a certain someone!)

(on the back of the boARD) check these 3 pins for batt voltage. only those 3 i have circled in red, the 4 pin (pin closest to the USB area is the gate, don't probe that)

or
(on the front of the board) if you can get through the conformal coating and solder mask, stick your DMM probe in anyone of these vias circled in red. there should be batt voltage there as well.
 

[KevyFenty]

It reads 4.2 across all three posts of that mosfet

[Spector NS5 RD]

your testing those 3 pins without the USB plugged in, correct? any missing components from either side of the board? can you post a couple, good quality, shots of the board front and back? as a last ditch effort, try re-flashing the firmware on the board. it is possible you damaged the board, somehow, removing it from it's original enclosure (too much heat / slipped with the soldering iron and knocked off an SMD / stray solder blob is shorting a component). more than likely you'll be opening a help ticket with Evolv for a new board. 

link for help ticket....

https://helpdesk.evolvapor.com/?a=add

[KevyFenty]

Well, I was going over it again and ripped a part of the green cover on the board. Blehg.

[Briantags88]

Anybody know how to fix the "weak Battery" issue while using the 22650 battery on the SKAR?  i get the warning right around %80.  I am running it at 42 watts.  The 18650 batteries work just fine tho? 

[retird]

My guess is that you are seeing "battery sag" with the 26650 which is not quite up to the task.  You say 18650's work just fine so I suspect the 26650 battery.

[giz_60]

I was having the same issue with a 26650 on the Skar as well until I ran the battery analyzer. Now I can get down to about 5% or so. I run mostly in TC. I can actually watch the temperature sag before I even get any battery warning.