eVic Control head shut down

[Jackstraw]

I have 2 eVic set ups. A 18650 tube and an 18350 tube. I have a separate head for each.

I run at approx 4V / 7W / 2.4 ohms clearo. I am in VW mode at 7.0

The 18350 config will not work under 50% battery power. it shuts itself off automatically. Always.
Is this normal or is there a config setting I need to adjust?

 

[Sthur]

I think mine did the same with a dcc, but after turning it back on I was able to keep vaping ok. I do think I turned down the power too.

You able to turn it back on and continue to vape?

This a stock battery? Pink Samsung ? Possibly your battery can't keep up with 7 watts on low power.

 

[tom_chang79]

Most likely the 18350 can't maintain the voltage at a certain current out when near 50% capacity.

The volts out on a battery goes down as it discharges, in order to maintain the same output wattage delivered to the load, the internal switching power supply will pull more and more current in order to satisfy the requirement from the load (atomizer) based on the user setting (7W)

You're probably experiencing a brown-out from a weak battery. What type of 18350 is it? I use the AW 700mAH 18350 in my mini mode, and it can deliver the required current down to about 10-20% of battery life...

Don't be fooled by mAH ratings of other "-fire" brands, it all comes down to the internal resistance inside the battery. If the internal resistance is high, the output voltage from the batter will drop, as well as heat up...

 

[Jackstraw]

Thanks for comments
Batt is AW IMR 700mah, 6 weeks old

 

[tom_chang79]

Thanks for comments
Batt is AW IMR 700mah, 6 weeks old

Strange, perhaps you got a fluke battery... Where did you get your AW? There are AW fakes since they command a *slightly* higher price then the rest...

I get mine from Sun Vapers and Provape...

 

[Jackstraw]

Stormry vapor Cellar

https://stormysvaporcellar.com/oc_1/index.php

AW IMR18350 700mAh LiMN Rechargeable Lithium Battery

Also got a shorty 18350 tube, but the spring was broken inside (Grrrr) and I had to get another.

 

[crxess]

It is a battery issue.
I have 2 trustfire 1200mah and one is getting a little funky.
Good one works to 19% or less
Funky will crap out at 60% in cooler weather and 38% when warm.

 

[NicoHolic]

You can swap the tube/battery setups between heads and see where the limitation is.

 

[EddardinWinter]

Stormry vapor Cellar

https://stormysvaporcellar.com/oc_1/index.php

AW IMR18350 700mAh LiMN Rechargeable Lithium Battery

Also got a shorty 18350 tube, but the spring was broken inside (Grrrr) and I had to get another.

Interesting.

I look at the picture on the site next to my AW IMR 18490, and the lettering is definitely smaller. I pulled two others that I have and they have the same letter size. I got mine from RTD, and they have worked great. Maybe (just maybe) the ones you got there are knock-offs.... It could be absolutely nothing, though. Here is the pic of mine.

Also, does your battery have one or two vent holes at the positive terminal. All of mine AWs have two, the ones in the picture from the site you linked appear to have only one.

In any case, I would always get my batteries from RTD.
Genuine AW Batteries at RTD Vapor

Great vendor and I always have had a positive experience with them. Their prices are better than the site you linked, as well.

 

[Jackstraw]

I'll check the lettering, but your pic is an 18490. I am talking about an 18350. Does this make a difference on the lettering?
thx

 

[EddardinWinter]

I don't know how I screwed that up. It would make a difference. Duh. Not in a position to post an 18350 pic right now....

How about the vent holes?



Tapped out

 

[Jackstraw]

I'll check
thx

 

[Jackstraw]

Yep, 2 at the top

 

[EddardinWinter]

So much for my theory.



Tapped out

 

[tom_chang79]

Hey Jack, do you have a spare 18350 you can try? Also, how does your end cap on your 18350 tube look? Mine, the threading is sloppy, I think the first two to three rows are stripped, so it's using the last two rows to screw in...

Also, the end cap's threading and also the head threading serves as the DC return path. Mine worked out of the box, but I noticed paint, probably due to poor masking during painting, on the threads... I tried to rid as much as I can with an X-Acto blade and q-tip+isoprop alcohol...

 

[Jackstraw]

I don't think it's stripped at all. Seems perfect.