NIMH and Mech mod. Is this possible?? Puck inspired :)

[JoBloGo]

Hi all, I'm looking for an NIMH battery expert. I would love to build a puck mod (next on my list), but in the meantime:

In my research for building a Puck, I have some across a cylindrical battery holder (converter), that takes 4 AAA batteries and hook them up in a series. From what I understand, If I use 4 AAA 850mAh in a series that will give me 4.2 volts and 850 mah, right (Lenmar Ready-2-Go R2GAAA8 1.2V 850mAh Rechargeable NiMH)? Using Ohms law, a 2.4 ohm clearo will pull 2 amps. I guess my question is, if I can find a mech mod that the battery holder will fit, will this work? I know that the puck mod site suggests using a tank at 3.0 ohm (can anyone tell me why, i'm still learning).

With a 2.6 ohm clero will draw at around 2 amps, 850 mah will give me under 1/2 hour of (constant, like button is pushed down the whole time) use. So, say....1-2 hours of vaping (depending on draw)?

I've read that NIMH is a pretty safe battery technology, but are there any risks to this vs. a puck mod. Does voltage drop off a lot when the battery is draining? Is there any safety risk in over discharging?

The reason that this is Puck inspired is because, isn't a puck mod really just a (really cool) mech mod (or am a really off-base)? It seems as if the puck mod doesn't have over discharge or short protection as well. Could there be some issue with the wiring and load?

TLDR:

Will this work:

4*AAA Serial Cylindrical Plastic Battery Holder + 18-Arhat Mechanical Mod + Innokin iClear 16
=
super-safe awesome-sauce??

Are my thoughts anywhere in the ballpark of correct?

Thanks!

 

[mtennant]

I'd recommend four AA batteries instead of AAA's. Longer life is the main reason. You can make a simple mod using a Radio Shack 4AA battery holder (4 AA Battery Holder : Battery Holders | RadioShack.com), a switch, and a prewired 510 connector (Prewired 510 Battery Connector, Sealed). I'll post a photo later.

 

[mtennant]

Here is my latest 4AA mod. I used some putty epoxy to encapsulate the switch, wires and 510 connector. I use a 1 ohm triple twist coil using 0.5 x 0.1mm Kanthal A-1 wire. Long battery life using Eneloop rechargeable AA batteries.

 

[Nikkel]

You could "build" a Nomod or an Almost Nomod. Actually, no modding is required. Just plug and play.
http://www.e-cigarette-forum.com/fo...le-electronic-board-diy-mod.html#post12741523
http://www.e-cigarette-forum.com/fo...-portable-usb-battery-packs-3.html#post137972
There is one mech mod that I know of that is long enough to hold three 2/3 A size NiMH:
2/3 A size 1.2 V, 1600 mAh rechargeable NiMH batteries?: FastTech Forums
There are reports that claim 3 AA and AAA NiMHs work well:
https://www.youtube.com/watch?v=3a5LqJLu330
https://www.youtube.com/watch?v=4iE6QcFLRrg
One report claims a single AA would work:
https://www.youtube.com/watch?v=NJxoLm8xitU

Cheapest source I've found for the VV mini passthrough:
[url]http://www.v-ecigs.com/ego-mini-vv-passthrough/
Cheapest source I've found for the non-VV passthrough:
510 high voltageManual USB Passthrough
It seems to me that the ease and versatility of pairing a passthrough with a NiMH battery pack has made the puck mod obsolete. The passthroughs have the switch, atty connector, and control circuitry built-in.

[/URL]

 

[JoBloGo]

I love the nomod, I actually have a vv passthrough on order from fasttech. Just having a bit of trouble sourcing the battery bix in canada (shipping us super pricey). I also think the 4aa mod would be amazing in a wood case (wish I was good at woodworking)

 

[MorpheusPA]

In my research for building a Puck, I have some across a cylindrical battery holder (converter), that takes 4 AAA batteries and hook them up in a series. From what I understand, If I use 4 AAA 850mAh in a series that will give me 4.2 volts and 850 mah, right ([/SIZE]Lenmar Ready-2-Go R2GAAA8 1.2V 850mAh Rechargeable NiMH)? Using Ohms law, a 2.4 ohm clearo will pull 2 amps. I guess my question is, if I can find a mech mod that the battery holder will fit, will this work? I know that the puck mod site suggests using a tank at 3.0 ohm (can anyone tell me why, i'm still learning).

2 A pull on an 850 mAh battery is 2.3C (2.3 times the capacity of the battery). You'll get a decent sized voltage drop, but it'll work.

If you were to use a larger capacity battery, C would drop, which would reduce the voltage drop.

With a 2.6 ohm clero will draw at around 2 amps, 850 mah will give me under 1/2 hour of (constant, like button is pushed down the whole time) use. So, say....1-2 hours of vaping (depending on draw)?

It does depend, of course. For me, yes, that would be around 1.5 hours, but I'm a chain vaper.

I've read that NIMH is a pretty safe battery technology, but are there any risks to this vs. a puck mod. Does voltage drop off a lot when the battery is draining? Is there any safety risk in over discharging?

There are always risks. However, in this instance, NiMH will be a very forgiving technology. The drain is large, but reasonable, and NiMH usually don't fail spectacularly under load (they save that for charging if it's going to happen at all).

There's no safety risk to you in over-discharging the batteries, but it does shorten battery life rather amazingly in the case of NiMH.

Theoretically? You can drain the cells to 0.4 V or 0.5 V if you don't mind killing them very, very fast.

Functionally? 2.0 V or less won't give you a decent vape at all so you're not going to drain 4 batteries that low. When they start to "fall off the cliff" of voltage (when they're very close to the end of their charge), you'll stop using them. My guess is that this will be at 0.8 V or higher. 0.8 V is still a bit low (the recommended charge is at 1.0 V or so), but not a complete battery killer.

The reason that this is Puck inspired is because, isn't a puck mod really just a (really cool) mech mod (or am a really off-base)? It seems as if the puck mod doesn't have over discharge or short protection as well. Could there be some issue with the wiring and load?

Without actually seeing the design, I can't say.

Over-discharge is not a risk for you, just for the batteries. Which might eventually leak if you keep over-discharging them for a long time.

Short protection...I always consider short protection a very good idea, but mechanical mods simply don't have them. Please be sure to check your build before using it with a good ohm meter.

Will this work:

4*AAA Serial Cylindrical Plastic Battery Holder + 18-Arhat Mechanical Mod + Innokin iClear 16
=
super-safe awesome-sauce??

Are my thoughts anywhere in the ballpark of correct?

Thanks!

TL;DR. Yes, but with some warnings.

 

[Nikkel]

Will this work:
4*AAA Serial Cylindrical Plastic Battery Holder + 18-Arhat Mechanical Mod + Innokin iClear 16

I don't think that would work. The mod you listed is made for an 18650 battery, with a diameter of about 18mm. The 4AAA cylindrical battery holder is about 25mm in diameter. It might work in a mod designed for a 26650 battery, with a diameter of about 26mm. The 4AAA cylindrical battery holder is a bit shorter than a 26650 battery, but if the mod was telescopic, it might work.

 

[a14u4ia]

4 nimh x AA mod has been working for me for a few months, It can do .5 ohm and up fairly comfortably, and a couple puffs of my RBA keeps it cooler than chain vaping a Kanger bottom coil. my multi meter states that they only put out 4.1 amps and there is a noticeable drop after 3 amps. batts still say about 4 volts but with lower resistance leads to a hefty voltage drop. I believe that gives consistency to my vape, They also seem to perform differently on a dual versus single coil of the same resistance, the dual seems less likely to get burnt tasting. Got twin twisted 28 guage on my trident t .5 ohm with a box made from a 5a 500v switch, 4aa holder (had switch) with cover, 510 to ego 510 connector, lil speaker wire, and a gator clip to make it pocket friendly. have tried some other switches before but the seem to leak volts after awhile, think this one is practically mech with a little tactile feedback.

The 26650 mech mod could work, especially telescoping, or with a stack of old pennies.

Glad to see someone else side stepping the lithiums, don't want to see anyone having one of those go off, surely 99% of the time its by surprise this is supposed to be risk reduction right!

 

[JoBloGo]

Thanks for the great info, MorpheusPA. Thank you!

 

[JoBloGo]

Thanks for the info, I'll take a look at the 26650 mechs, but I think that I'm going to try out a no-mod to see if NIMH works for me. I;m having some trouble sourcing out a USB battery box in Canada.

I'm looking at pairing a "AA-Battery USB Emergency Backup Power and Charger Pack" from Deal Extreme, and a VV Passthrough from Fasttech. Is there anything I should look for in the specs to make sure it would work?

The deal extreme battery box doesn't seem to have any limiters (not sure if it's the right word). So I should get 4.8V, and be able to pull 2 amps (is that right?)