Any Wraith/Lambo/Lavatube 18650 VV mod users?

[johnnydotexe]

I just got my chrome Wraith v4.1 in from Vapoligy this morning and it's a pretty neat mod. It doesn't allow watt adjustment like the Vamo but it does allow voltage adjustment, resistance check, voltage check, voltage lock, master on/off, and several fail-safes. I wanted the version with the black rubber coating but they were out. Here's the product page for the chrome...Chrome Wraith Variable Voltage

I have noticed an issue with this device. In Vapoligy's product page description it says the mod will auto-adjust voltage down on accessories rated at 2.70ohm or lower for safety reasons. If I run anything below 2.7ohm this device automatically shuts off and won't turn back on for 15-30 seconds or I can have it back on quicker with a battery pull.

So far I've tested a 1.6ohm dual-coil carto tank and a 2.0ohm dual-coil carto. This is what I found out(resistance and voltage readings per the mod's screen)...

1.6ohm - Won't run on anything higher than 3.2v(6.40w)

2.0ohm - Won't run on anything higher than 3.8v(7.22w).

Is it only finicky on sub 2.7ohm accessories or am I going to be limited below 8watts no matter what the resistance is? If the latter then that is a terrible limitation and would warrant a return of the product, not to mention the fact my normal vape level is roughly 9watts. If the former then that is a bit inconvenient for me but easily resolved by buying new higher-resistance accessories to replace all my 1.5-2.0ohm accessories.

Also I'm not sure if dual-coil cartos are ok to use with this mod. So far I haven't had any issues, but as I mentioned above this mod isn't auto-adjusting the voltage down if the resistance is "too low." It just shuts off.

Any users that could clarify this stuff for me?

 

[johnnydotexe]

Found a Boge 2.5ohm carto that I had filled some time ago and forgot about. On the wraith with a freshly charged battery it read 2.6ohm. I fired it all the way up to 4.5 and it vaped, but once I stopped the device shut off until I did a battery pull. After that the carto has been reading 3.6ohm but is still firing. Multimeter is also showing a reading of 3.6ohm on that carto. Weird.

Just tried a 3.0ohm clearomizer(similar to the workings of a vivi nova) and it reads 3.1ohm on the wraith. Fired and vaped at 5.0v(8.06watts) no problem. Shuts off after a second or two when trying to fire at 5.1-5.2v. Shuts off immediately when trying to fire at 5.3-6.0v. The clearomizer rules out this problem being caused by dual-coil cartos.

Over the last few minutes I'm noticing when I put the battery in and start tightening the end-cap the mod is on until the cap is tightened completely, then the mod shuts off and won't turn back on. I pondered the possibility of this issue and the above issues having something to do with using protected li-ion instead of IMR but the only differences are chemistry and length, function/performance are the same and those battery types are interchangeable in any other device.

 

[dirtyrigger]

You are experiencing amp limitations with the low resistance cartos. As for the unit shutting down till you pull the battery, either your device is a lemon (my first guess) or your protected batteries are having issues with the devices built in protection. Did these batteries come with the unit in a kit or did you purchase them separately? If you did get them separately what brand are they? If they came with it send the whole kit backand get something decent. The only way i can think to narrow the problem anymore would be to try a different type of battery.

 

[johnnydotexe]

You are experiencing amp limitations with the low resistance cartos. As for the unit shutting down till you pull the battery, either your device is a lemon (my first guess) or your protected batteries are having issues with the devices built in protection. Did these batteries come with the unit in a kit or did you purchase them separately? If you did get them separately what brand are they? If they came with it send the whole kit backand get something decent. The only way i can think to narrow the problem anymore would be to try a different type of battery.

I thought that maybe I was just having issues with accessories under 2.7ohm since the product page says to use 2.7-4.0ohm. That's why I tried the boge 2.5ohm and the clearo 3.0ohm...but those had the same issues at and above certain voltages. I couldn't go higher than 5v(8w) on that 3.0ohm which I don't understand. My normal vape is about 8.5-9.0 watts (3.7v @ 1.5ohm, see sig) and IMHO that's a pretty common setup which I feel any mod should be able to accomplish. I'd consider a mod unable to go above 8watts as broken.

I'm using trustfire/ultrafire 18650s from madvapes. They're your average protected li-ion battery. As far as function and performance go they are no different than the IMRs recommended for this mod and both battery types are interchangeable in any other mod unless the added 2-4mm length of the protected li-ion is a problem.

 

[johnnydotexe]

I just spoke with someone at Vapoligy and at first they thought the device's safety feature was kicking in like normal. I explained that different resistance accessories/different voltages were cutting out at different watts and the highest watts I've been about to get out of the device before it cuts out was with a 3.0ohm clearo @ 5v and that is a hair over 8watts. They set up an RMA and will be shipping out my new wraith+prepaid shipping label today.

I really hope this was just a lemon and not a limitation of the device, but I think it's safe to assume the latter isn't the case since a buddy with the same device from the same company was able to vape at 6.0v on a 2.8ohm vivi nova head and not have the shutoff issue. I even had him measure the output voltage to be sure of this and it read 5.6v(the battery was maybe at half-charge) which was still more watts than what I'm able to get out of mine.

I'll do some more testing tomorrow when my vivi nova tank kits get here. Unfortunately I can't do any battery testing because all I have are trustfires and ultrafires. I never bought in to the AW/IMR hype since the protected li-ions have served me well over the last few years.

 

[Thompson]

It says it has a 2.5amp cut off, which is pretty low. I think most are trying to bump it up higher, 4-5A.

But even at the voltages & resistances you've posted, your only running about 2A. So it does seem like there might be something wonky with it.

1.6Ω @ 3.2v = 2A
2.0Ω @ 3.8v = 1.9A
3.0Ω @ 5.0v = 1.67A
2.8Ω @ 6.0v = 2.14A

AW/IMR are going to be higher amp output, some boost circuits require this. No hype at all.

 

[johnnydotexe]

It says it has a 2.5amp cut off, which is pretty low. I think most are trying to bump it up higher, 4-5A.

But even at the voltages & resistances you've posted, your only running about 2A. So it does seem like there might be something wonky with it.

I would hope so. My normal vape is 3.7v@1.5ohm=9.1w and if I can't get that same wattage out of this device then it's pretty much useless to me. My knowledge of that stuff stops at watts, though. No idea on how amps play in to this.

ETA: Looks like it's I = W / V. So in that case my 3.7v@1.5ohm/9.1~ watt vape would be 2.46~ amps. Still below the 2.5amp limit these devices apparently have.

 

[Thompson]

They are full circle in Ohm's Law.

This should cover it, better than how I'd end up typing it out

An analogy for Ohm's Law : Ohm's Law

But yeah it seems to be kicking in safety protection before the limit, or as mentioned above maybe the protection circuitry in the batteries isn't liking it.

 

[johnnydotexe]

The thing that confuses me is the issue wasn't consistent. As you can see from my tests it was cutting out at different amps/watts depending on which accessory/resistance I had installed.

I noticed that you edited in the tip about IMRs being higher-amp so perhaps my protected li-ions are the problem. Unfortunately my replacement device is already shipped out and I don't have any IMRs on hand to do any testing. I'll try to order a pair this weekend.

 

[johnnydotexe]

I swapped out the Trustfire 2400mah 18650 with a just-off-the-charger Ultrafire 3000mah 18650 and I am able to crank this thing up to 6.0v with the 3.0ohm clearomizer installed.

Does this confirm the theory of my batteries being the issue? If so, how come a 2400mah TF causes a shutoff but these IMRs that are 2000-2200mah apparently don't?

 

[dirtyrigger]

Because "protected" means the battery has a resetting fuse in the battery itself, sometimes these fuses have performance issues when used with mods that boost output.

 

[johnnydotexe]

So in my case it's not necessarily the mah that's the problem, it's the protection circuit and how many amps they'll let through before shutting down? Meaning the Trustfire's circuit is cutting out before the UltraFire's circuit does?

 

[dirtyrigger]

I'm not saying that's definitely what's going, but it is possible. That's why i recommend trying a different battery. Maybe you have a friend with an IMR they would let you test the theory with. If its not a battery problem then it is definitely the device that's defective.

 

[johnnydotexe]

I'm not saying that's definitely what's going, but it is possible. That's why i recommend trying a different battery. Maybe you have a friend with an IMR they would let you test the theory with. If its not a battery problem then it is definitely the device that's defective.

There's definitely something going on with the batteries. Testing with the 3.0ohm clearomizer shuts it down over 5.0v on the 2400mah trustfire, but I can go all the way up to 6.0v on the 3000mah ultrafire.

My replacement is on its way and I let vapoligy know what I found out. Tonight I'll be ordering a pair of those panasonic hybrid IMRs that seem to be popular amongst VV vapers.