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I just checked one of my 2.7 AMP tanks (2.7 oHm) at 10 watts on one of my VAMOs using a fully charged Panasonic CGR18650CH I got from Carolina Vapes and I didn't notice any difference in taste nor vapor when I switched the AMP tank to my other VAMO with stacked Efest 18350s with 4.0 volts of charge remaining.
I don't know if it would help but it surely wouldn't hurt to clean your battery and VAMO contacts and make sure that the spring is applying sufficient force to keep the battery connection solid. I replaced the springs on my VAMOs with copper ones used on the Silver Bullet, Omega or Helix.
I don't know if it would help but it surely wouldn't hurt to clean your battery and VAMO contacts and make sure that the spring is applying sufficient force to keep the battery connection solid. I replaced the springs on my VAMOs with copper ones used on the Silver Bullet, Omega or Helix.
You know, I reported the same thing at the link below, and it seems that genuine or not, there is an issue with these batteries and high resistance. I am using a high resistance atty (vivi nova, which the VAMO reads at 3.0 ohms). I'm certain my Panasonic is genuine. See pic below. I'm using dual 18350 eFest 800mah and it takes whatever wattage I throw at it. Tried at 10 watts just for testing.
http://www.e-cigarette-forum.com/fo...-doesnt-make-rattlesnake-noise-anymore-2.html
http://www.e-cigarette-forum.com/fo...-doesnt-make-rattlesnake-noise-anymore-2.html
It's not the battery... it's the Vamo. Watch Phil's video and note the voltage charts for the higher ohm attys.
You guys running stacked batteries have become used to the fact that you can achieve higher power more easily than with a single battery. When you put a single battery in, the vamo seems weak due to it's limitations.
Electronically, it doesn't make any sense that a battery will struggle with a higher ohm atty. The load is less with more resistance so the battery doesn't even have to work hard.
You guys running stacked batteries have become used to the fact that you can achieve higher power more easily than with a single battery. When you put a single battery in, the vamo seems weak due to it's limitations.
Electronically, it doesn't make any sense that a battery will struggle with a higher ohm atty. The load is less with more resistance so the battery doesn't even have to work hard.
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In context of this PV though, it's accurate to say we'd want to run dual 18350's as opposed to a single 18650 for the higher power guys. FWIW, my single 18650 struggled with vapor production even at something reasonable like 7 watts on a 3ohm resistance.
Or... run a lower ohm atty.
I don't have any problems running on a single battery at around 8.5 watts. Any more power than that burns the juice I use. The Vamo has limitations with both very low and very high ohm loads. You just have to find the best in-between load to run at if you want to run single batteries. Think about it right... how many people stack batteries in mechanical mods? Rather than stack, try lowering the ohm ratings of your attys.
I am thinking something else is going on here.
In Phil's video using a single 18650 on the 6V setting he achieved 5.8V using a 3.1 ohm atomizer, which is about 10.85W.
This shouldn't feel like a weaker vape.
It is quite possible that some of the components sourced for the circuit boards might not be up to snuff.
I remember well how they address the weak initial spring with a stronger spring that had high resistance.
In Phil's video using a single 18650 on the 6V setting he achieved 5.8V using a 3.1 ohm atomizer, which is about 10.85W.
This shouldn't feel like a weaker vape.
It is quite possible that some of the components sourced for the circuit boards might not be up to snuff.
I remember well how they address the weak initial spring with a stronger spring that had high resistance.
The problem with Phil's video is that he didn't do a complete job in supplying information across the board. He showed waveforms for a single battery, but he didn't show any for stacked batteries.
It's possible the vamo is railing to a higher voltage (7.4 - 8.2 volts) when using stacked batteries (as opposed to 6 volts with single batteries). I don't have an o-scope at home so I can't verify this, and none of the Vamo reviews showed any waveforms with stacked batteries.
It's not that 10.85 Watts will be a weak vape, but in comparison to a higher railed voltage, it may feel weaker. You have to remember that only the average voltage is being displayed by the Vamo, the peak voltage is still at the rail. Higher rail, higher instantaneous heating, albeit for a short time.
You have a point about the incomplete data, although I applaud Phil on that fact that he gave us more than anyone.
What leads me to believe something else may be going on here is that this is something new that hasn't really been reported before.
Guys like peraspera, that have had their Vamo's a while, not able to detect any difference as well as my own experience with my Vamo's.
The Op stated that they were raising their wattage to 14W trying to get the same vape as 8W using stacked batteries. (yeah I know you're not gonna get anything higher than 11-12W)
That's quite a jump!
Using my LR coils, going from 8W to 12W is more like weak to blow your head off!
That all said, it would be nice to hear back from the Op.
I have both the Panasonic and Efest batteries in question and 2 Vamo's 6 Months old and 3 months old.
I have some 2.8 ohm Vivi heads, but haven't used my Vivi's since I started rolling my own coils.
I vaped them around 6-8.5W as opposed to the 9-12W with my AGA's.
Maybe I'll get a wild hair and load up a Vivi.
IDK guys, I have no problem with strength of vape on a single eFest 18350 or 18650 when switching between 2.0 ohm and 3.0 ohm single coil cartos on the Vamo. I might vape the 3 ohm about half a watt higher than the 2 ohm (say 9 watts instead of 8.5) but that's it. Same story on all 4 VAMOs.
Also, if you are running dual coil instead of single coil, that could explain a lot.
Also, if you are running dual coil instead of single coil, that could explain a lot.
I think the OP is experiencing a "perception" issue. He's been vaping on stacked batteries for so long that he's used to it (speculation here). Stacked configuration will output a higher peak voltage than non-stacked and the end result will be more vapor production, heat and even a stronger hit. If you're used to the "strength of vape" of 8 watts from a stacked batt config, you'll think that 8 watts from a single batt config is weaker.
You can try this yourself if you have more than one Vamo and the required batteries (use freshly charged batteries for the best results). Try stacking one vamo and leaving one in single config. Set both to 8 watts. Then simply move an atty (say 1.7 ohm or whatever's) between the two. You'll see that the stacked vamo will give more vapor, and a stronger hit. And, if you vape the stacked vamo for any length of time (say 10 mins), and then switch back to the single config, it'll "seem" even weaker.
All of it is due to how the vamo operates as it rails to whatever the input voltage is. This is also why some people think the vamo (or other similar setup PVs) hits harder than a Provari set to the same voltage setting. Or, harder than a mech mod set to the same voltage/wattage, for that matter.
You can try this yourself if you have more than one Vamo and the required batteries (use freshly charged batteries for the best results). Try stacking one vamo and leaving one in single config. Set both to 8 watts. Then simply move an atty (say 1.7 ohm or whatever's) between the two. You'll see that the stacked vamo will give more vapor, and a stronger hit. And, if you vape the stacked vamo for any length of time (say 10 mins), and then switch back to the single config, it'll "seem" even weaker.
All of it is due to how the vamo operates as it rails to whatever the input voltage is. This is also why some people think the vamo (or other similar setup PVs) hits harder than a Provari set to the same voltage setting. Or, harder than a mech mod set to the same voltage/wattage, for that matter.
Yup!
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Sorry for keeping everyone in the dark so long. Life got in the way (Wah, Wah, Wah).
- I'm not using dual coils...I have some issues with them
- the battery is a KEEPPOWER rebadge
- Haven't done the single imr18350/stacked/hybrid 18650 comparison yet..Will try my best to when i get home tonight
I'm not sure I understand your post? If watts=V*V/OHM, and OHM's and watts is set to a constant value shouldn't the voltage be a constant value as well?
My perception is based on perceived heat (energy)/vapor production. I would think that this translates to power being supplied to the delivery device. If the vamo was designed to work with a single batt wouldn't the voltage be adjusted to meet the stated watts ?
- I'm not using dual coils...I have some issues with them
- the battery is a KEEPPOWER rebadge
- Haven't done the single imr18350/stacked/hybrid 18650 comparison yet..Will try my best to when i get home tonight
I'm not sure I understand your post? If watts=V*V/OHM, and OHM's and watts is set to a constant value shouldn't the voltage be a constant value as well?
My perception is based on perceived heat (energy)/vapor production. I would think that this translates to power being supplied to the delivery device. If the vamo was designed to work with a single batt wouldn't the voltage be adjusted to meet the stated watts ?
The Vamo uses pulse wave modulation (PWM). The output of the Vamo is NOT DC... it's a pulsed waveform. The peak voltage with a single battery is around 6 volts (see Phil's Vamo review). The peak voltage with stacked batteries is anyone's guess... but it's definitely higher than 6 volts and could be up to 8.4 volts (stacked 4.2v batteries) for all we know.
Whenever the vamo fires, the atty gets hit with a train of pulses that have a peak voltage governed by what battery configuration happens to be installed in the Vamo. When you adjust the voltage/wattage on the Vamo, you're basically adjusting how wide the pulse is... the peak voltage remains the same so the atty gets hit with the peak voltage for either a shorter or longer time depending on your settings. When you run stacked batteries, you raise the peak voltage, and in doing so, you'll see more heat/vapor production.
Basically, 8 watts using a single battery is NOT the same as 8 watts using stacked batteries in the Vamo. Ohm's law with PV's that run PWM (non-DC output) also doesn't really apply. You can use it to roughly calculate stuff, since you do have a figure to go by on the LCD, but it's only a close approximation.
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nahoku:
Keep in mind i still only tried the hybrid on single mode not the IMR's
A 2.7 ohm delivery at 6v = 13.33 watts. No where near to what i'm getting whether i set it at 13 watts or 14.5 watts
Both should be regulated by the vamo's electronics/control board
If the vamo has a chip that calculates how wide the pulse is, then this should be more or less constant, regardless of the batterry's peak voltage. Whether the battery has a peak of 6v or 8.4v shouldn't i be getting a minimum pulse that equals to 8 watts on a 2.7ohm?
It's not even close. Set at 14.5w on a single feels like 6.5w on a stacked
Keep in mind i still only tried the hybrid on single mode not the IMR's
Applying ohm's law using the values shown on the Vamo's LCD is not accurate. The Vamo DOES NOT output a flat DC voltage. You really need to watch Phil's video to see the limitations and I can't stress how important this is so you can more-so understand what you're seeing.
You might be giving the Vamo too much credit. Who's to even say there's circuitry present that will do this. However, you would think that the Vamo would do this, but if you've noticed, your LCD screen get's brighter when you stack batteries (as opposed to a single battery). This tells me that the Vamo circuitry will run on whatever VCC is applied to it (up to a limit). I don't have an O-scope handy, so I can't do measurements, however, nothing is to say that when you apply a higher VCC the Vamo doesn't use it throughout it's circuitry, to include whatever boost circuits it has, it's PWM circuit, or whatever output circuits are there.
Again, you would think that's how it should work, but, if you think about it, if the rail moves to 8.4 volts, and the Vamo calculates it's wattage the same way it does with a 6 volt rail, then your output could actually be 2.4 volts higher with stacked batteries. Again, we can't tell without waveforms, but the Vamo sure does look like it's operating this way. How else could it "appear" to output more power with stacked batteries?
Honestly, if I run stacked batteries versus a single battery on my Vamos, I can also sense the difference in performance at the very same wattage setting. It's very clear to me that the Vamo is funky! Certainly, if the Vamo were to run "as expected" then it might cost more than it does.
All your questions and concerns tell me that you expect the Vamo to run as a well designed PV, with top notch circuitry that can handle varied input voltages and regulate them to a specific peak voltage to attain calculated output power. This isn't a bad thing to want, but given it's a cheaper mod, I honestly don't think they put that kind of thought into it.
Please watch Phil's video.
Thanks nahoku. I just wanted to add that i ran a single imr 18350 and it performed identical to the hybrid 18650 on the high resis atty. The lower resis deliveries seem to work all the same whether stacked or single. I was wondering if other mods perform similarly on single batt. With high resis.
Well, that's good. I'm guessing you're satisfied with how your hybrid battery is working then?
The only VV/VW PV's I own are Vamos so I can't comment on anything else. My other mods are two Smok Naturals (kicked), and a few ego type batteries.
This is true, but being that I rebuild my vivi nova attys which range from 2.1 to 3.0 ohms depending on the wraps I'd rather not have to fidget with different batteries based on resistance. Defeats the purpose of a VW mod IMO. To each their own I suppose. I'll stick with the dual 18350s on this mod.
I was just trying to help. I'm so used to vaping around 8.5 watts because I build my IGO-Ls to around 1.5 - 1.7 ohms and so that helps the voltage stay well inside the range supplied by a single battery. Like you said to each his own and I can understand that if you build your coils in that range, it makes sense for you to run stacked.
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The stacked mode seems to be on target with power feed across the resistence spectrum. Something tells me that the vamo was designed for stacked batts. You mentioned that the only vv mods you own are vamos. I'm waiting for other folks to comment on single batt ops on other mods, because im curious if it has something to do with batteries reaching peak voltage. I've noticed that in single mode the atomizer eventually gets hot and produces good warm vapor on the high resis. after about 5 seconds. Is it possible that the single battery is actually reaching higher voltages but it just takes some time to get there? I would be very interested if users of other vv mods comment on their experiences.
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