MECH. SAG . . . . . . . really?

[pdib]

So, I'm curious. One of the things folks say to people (or people to folks) who are considering mechanical mods is, "your batteries are gonna sag and your vape will get weak unless its a fresh battery". Does anyone actually experience this? The thing is, when I went mechanical, I got the MNKE batteries, cause the folks who reviewed them said they hit hard and don't sag. So, I don't have this issue. My vapes are great until the battery is done, then suddenly, "poom". . . . . big drop and I switch batts.

So my question is this. Is mech. sag for reals?

 

[Cjax]

Yes, but it depend on the battery. IIRC, The mnke's have a very sharp curve on a performance chart, whereas other batteries die much more gradually. Which means they perform very well at a high voltage output for most of their cycle, but when they go, they GO! I use Panasonic cgr's mostly because they tend to hang around that mid level range much longer than most. I have some other imr's though that it's much more obvious when they are draining.

 

[Thrasher]

not quit as dramatic as you put it but yea. it happens with a less then fresh battery and usualy happens on a long/longer press.

this is one of the benefits of the regulated mods they counter the sag by drawing more current.

many of the batteries when they are rated a graph is drawn of the continuous voltage draw and you can see the sag, but for a 4 second press on a sub ohm coil its not noticable for quit some time.



there is a reason mech users like those mnke's

 

[Baditude]

Yes, it is. Some mech users will deny it, but it is true for the most part. I can always tell the difference when I put a fresh battery in a mechanical mod. The drop off is so slow over time that you may not notice it.

The MNKE are specially designed high drain batteries with a high amp output and will give a performance much as you shared. For this type of performance their is a slight to medium tradeoff in mAh (expected time of use per charge).

 

[AttyPops]

It's not really the sag the messes people up...it's the "fresh charge bump"....IMHO.

In other words....the great thing about Li-Ion class batteries (the IMR stuff too, as in the mech case) is that they maintain a fairly level voltage output through most of the usage cycle. That isn't true for all other battery types. Some are much more linear.

However, they have a "topped off" charge of 4.2 volts. That goes away quickly. But if your ohms are set to take advantage of that voltage, rather than the 3.7/3.6 volts that is "normal"...you'll get disappointed fast.

If I were doing all-mech again, I'd set ohms for the 3.65 voltage average and recharge below 3.6 volts. I would ignore the 4.2 initial charge and just "vape through it" since it doesn't last long anyway. The 3.7/3.6 volt range is the majority of the useful range.

Then again, I did normal ohm stuff, not SLR. So IDK if that makes much difference for the above info. Regardless, you can ALWAYS tell voltage drop on a non-regulated e-cig particularly near the end of whatever your useful range is.

If the MNKE's have a better/flatter curve, great.

IDK if that helps or not, but it's just

 

[Unforeseen]

Moved to APV Discussion

 

[plastictree]

What it feels like to me is that it starts at 4.2v, dips to 3.7v where it stays for a good while they dips again

 

[Commie]

I believe it to be subjective. Personally, I don't notice that much of a difference between 4.2 and 3.8. 3.7 I do notice, but not enough to bother me. My wife, however, notices much smaller drops in voltage.

 

[young gotti]

like many have said or at least the way i took it is.....i vape throughout the day 730am-730pm and don't really notice....if i dont' change my battery at that time i'll start to notice a drop off as the night goes on, however when i do change my battery it hits that much better

i just think the dropoff of .1v at a time aren't all that noticeable but then the jump of lets say .5 or .6 is a huge increase that it's noticeable

 

[Heavyrocker]

I use the Natural mech and i cant really tell when the my IMR batt is low,it hits right too the end of the batt life,i have to pop the batt out after about 4 hours as i know by my vaping habits when too check,one time i forgot too check and i ran the batt dead,lucky it still works.I have .6ohm wrap with mesh.

 

[donnah]

I was worried about batt life and so forth when I got my first mech. I came from a time before regulated voltage was the norm and hated that my 3.7 box mods dropped voltage, I always felt like I needed the change to a fresh batt. But I was pleasantly surprised with the batts life and voltage drop with a mech.

I only use gennys at .8 or .9ohms and can get pretty much a full day of satisfying vaping before changing to a fresh batt. I also only use 18650s in the mechs and can get longer (satisfying) vape time with an 18650 in a mech with a .8 coil than I can with an 18490 in a provari with a higher resistance silica based rba.

The vape is a little strong with a fresh batt and I have to tilt and make sure the coil is wicking more than usual but it soon settles down and I can vape normally. Yes, I do notice the voltage drop but it doesn't bother me like it did a couple years ago when my box mods dropped. I can tell if my coil has (for some reason) gone up in resistance and THAT bothers me

I use the panasonic CGR18650CH in my mechs and have been quite happy with them, considering I paid less than $20 shipped for 4 and they came with 2 plastic batt cases. They seem to hold the voltage steady a bit better than the AW IMRs.

 

[jasl90]

I think there's a difference battery sag and the battery tapering off as it discharges.

A good battery graph will show that a good high drain battery is able to hold a higher voltage under load, for a longer period of time than another that has a lower discharge capability... Even though the other battery has a higher mAh rating. Classic example... AW1600 out performing the AW2000 with low ohm coils. This what I consider "tapering off".

"Battery sag", on the other hand, is what happens when you force a battery to do wind sprints. I've noticed that when I chain vape it feels like the battery is dying faster than it should... Then I can leave it alone for a 1/2 hour or so, pick it back up later, and it's hitting like it recharged itself.
Note: this is far more noticeable with my smaller batteries. It's like they just need a little time to catch their breath.

Just my 2 cents...

 

[AttyPops]

I think there's a difference battery sag and the battery tapering off as it discharges.

A good battery graph will show that a good high drain battery is able to hold a higher voltage under load, for a longer period of time than another that has a lower discharge capability... Even though the other battery has a higher mAh rating. Classic example... AW1600 out performing the AW2000 with low ohm coils. This what I consider "tapering off".

"Battery sag", on the other hand, is what happens when you force a battery to do wind sprints. I've noticed that when I chain vape it feels like the battery is dying faster than it should... Then I can leave it alone for a 1/2 hour or so, pick it back up later, and it's hitting like it recharged itself.
Note: this is far more noticeable with my smaller batteries. It's like they just need a little time to catch their breath.

Just my 2 cents...

+100

However, I suspect this is most noticeable with high amp draws. Those pushing the limits with SLR and dual coils for example. I would expect "normal" vaping to follow the expected battery drain curve pretty closely. Particularly since all-mech should be using high-drain batteries (IMR). Like you said, probably depends on vaping style too.

What ohm stuff were you chain-vaping with?

 

[jasl90]

+100

However, I suspect this is most noticeable with high amp draws. Those pushing the limits with SLR and dual coils for example. I would expect "normal" vaping to follow the expected battery drain curve pretty closely. Particularly since all-mech should be using high-drain batteries (IMR). Like you said, probably depends on vaping style too.

What ohm stuff were you chain-vaping with?

Yes. Absolutely. Speaking only for myself, I've found that there's no reason to put anything that's 1 ohm or better on a mech... The Provari is better with 1+ ohm coils.
Also note... Not all high drain batteries are created equal. Both of the AW batteries (1600 & 2000), for example, are high drain IMRs. The difference is that the 2000mAh version is rated for a 10 amp discharge and the 1600 version is rated for 24 amp discharge.

 

[Thunderball]

Lots of knowledge in these replies. Thanks guys.

 

[Richard75]

I've always been able to go a full day on an 18500 without a noticeable change is power... I mean, I'm sure it's there, but the vape is satisfying 'til the sun goes down. And I've had an 18650 last me two days. Of course, I run usually no less than 1.3ohms (and that's low for me; 1.5 tends to be my sweet spot). And I'm also talking about moderate vaping, not chain vaping.