Mechanical reos will be seeing some upgrades

[Alexander Mundy]

good point. Personally, I always figured battery safety without accounting for voltage drop. "Rounding up" was a crude safety margin. Also, tho, I never really understood: does v-drop mean the battery is being taxed less? . . . . or only that the voltage isn't getting to the coil? (I had always assumed the latter).

(don't give the politicians any ideas or they will be taxing our batteries more)


Hmmm....last time I weighed in the first question I was poo pooed so I will leave it alone.

Second question is an "and" not an "or", the answer is both.
(Yes fellow electronics geeks that is based on certain assumptions about the question but I am not going into definitions of potentials etc. here......just taking it like it reads)

 

[ChrisEU]

The Vdrop we find in mods unfortunately is being transformed to heat - just not in our atomizer, but instead in the parts that have the additional resistance. That's why the spring gets hot and the battery's internal resistance will heat up the cell itself.

So yes, the power that's lost in the VDrop is actually being used, just not where we want it.

 

[pdib]

Right, so we don't account for v-drop when building to suit a battery's limitations. Call it 4.1 (or 4.2 if you're scaredy), and that's that.

 

[ChrisEU]

It's not entirely accurate, but yes, I use 4.2V myself to be on the safe side. It can never be more than 4.2V and that's good enough for most calculations.

 

[cioranes]

Hmmm. I always read that one should use voltage under load for battery safety calculations, but never really tried to understand why. Guess I wanted that to be true lol.

 

[ukeman]

regarding batts, .3+ Ohms, in my mind, is not for Reo b/f atomizers (but then again...) ... what surprised me was with all that vapor (.35 dual coil genesis with big dual sided airholes) unbelievable amounts, the vape was cool (vs harsh or hot)...

i'm sure once the new kit gets out, word gets out, we just might be seeing modifications to the attys for Reo's...




hmmm it'll be interesting to see if the Reo world, that social type, that sub culture, would expand....hahaha

 

[Raynman]

I used to file the pin every week or two. But now I put a dab of noalox on the positive battery button and haven't had to file for a few weeks. YMMV

 

[Vapolith]

I used to file the pin every week or two. But now I put a dab of noalox on the positive battery button and haven't had to file for a few weeks. YMMV

Might try that. It's easier to get at the positive button with my noalox bottle, than the firing pin.

 

[Jet Knight]

I used to file the pin every week or two. But now I put a dab of noalox on the positive battery button and haven't had to file for a few weeks. YMMV

Worked for me, so far so good, and easier than filing the pin.

 

[redeyedancer]

A little update I have paid the down payment and I hope to have the prototypes soon . You would think it would be easy to give your money away but sometimes its like pulling teeth .

 

[kazz63758]

A little update I have paid the down payment and I hope to have the prototypes soon . You would think it would be easy to give your money away but sometimes its like pulling teeth .

LOL, yes it is sometimes. Thanks for the update!

 

[lizardnipples]

For some of us that sadly haven't really thought too much about calculating battery safety, could you share that with us?
I never really worried as I was always running coils .8 and above on a 18650. I would like to be safer now that I have a mini 2.1

 

[Lunger]

A little update I have paid the down payment and I hope to have the prototypes soon . You would think it would be easy to give your money away but sometimes its like pulling teeth .

Great news! been following this thread religiously . Really lookign forward to buying one of those prototypes!

 

[Alexander Mundy]

For some of us that sadly haven't really thought too much about calculating battery safety, could you share that with us?
I never really worried as I was always running coils .8 and above on a 18650. I would like to be safer now that I have a mini 2.1

You need to know the maximum rated current for your battery.
There is usually a "C" rating.
Take the "C" rating times the battery Amp Hour capacity and that is the manufacturers suggested maximum rated continuous current.

For example this post lists the AW IMR18490 at 8C and 1100mah

http://www.e-cigarette-forum.com/fo...erica-shipping-worldwide-183.html#post2544909

1100 mah = 1.1 Amp Hour
So 8 X 1.1 = 8.8 Amps.

Now to figure what the theoretical minimum resistance for a coil would be*

Resistance = Voltage / Amperage
So 4.2V* / 8.8 Amps =.48 ohms (rounded)

Some caveats now.

Running a battery hard will shorten it's life.

Is that post correct?
Check out several sources you trust as we are all human at the most and can mistype or simply have the wrong information.

Some say since that is continuous it can be higher since we only load for short periods of time.
You will not however find a manufacturer saying the same that I am aware of.

*Some say to use the actual voltage present at the coil since some mods and batteries with comparatively high internal resistance can have large voltage drops.
Not promoting that one even though I personally use that theory for some mods / batteries because I will get poo pooed.
To be 100% safe don't use that thought (or drive, or cross the street,......)

IMR chemistry is inherently safer than Lithium Polymer so I would never fudge with LiPo's and would leave a wide safety margin.
(I used to fly model airplanes and have seen a LiPo pack go south)

 

[Gigdujour]

A little update I have paid the down payment and I hope to have the prototypes soon . You would think it would be easy to give your money away but sometimes its like pulling teeth .

If everyone else gave your level of customer service, it would be a much more stress free world (for us consumers anyway)


Master of Bassets...and not much else.

 

[MamaTried]

You need to know the maximum rated current for your battery.
There is usually a "C" rating.
Take the "C" rating times the battery Amp Hour capacity and that is the manufacturers suggested maximum rated continuous current.

For example this post lists the AW IMR18490 at 8C and 1100mah

http://www.e-cigarette-forum.com/fo...erica-shipping-worldwide-183.html#post2544909

1100 mah = 1.1 Amp Hour
So 8 X 1.1 = 8.8 Amps.

Now to figure what the theoretical minimum resistance for a coil would be*

Resistance = Voltage / Amperage
So 4.2V* / 8.8 Amps =.48 ohms (rounded)

Some caveats now.

Running a battery hard will shorten it's life.

Is that post correct?
Check out several sources you trust as we are all human at the most and can mistype or simply have the wrong information.

Some say since that is continuous it can be higher since we only load for short periods of time.
You will not however find a manufacturer saying the same that I am aware of.

*Some say to use the actual voltage present at the coil since some mods and batteries with comparatively high internal resistance can have large voltage drops.
Not promoting that one even though I personally use that theory for some mods / batteries because I will get poo pooed.
To be 100% safe don't use that thought (or drive, or cross the street,......)

IMR chemistry is inherently safer than Lithium Polymer so I would never fudge with LiPo's and would leave a wide safety margin.
(I used to fly model airplanes and have seen a LiPo pack go south)

LizzieNips- here's some background stuff i keep bookmarked to supplement what Magic Mundy said
http://www.e-cigarette-forum.com/forum/new-members-forum/438046-battery-info.html#post9996925

 

[pdib]

AW lists the AW IMR 18490 as 15C

Other sites list it as 8c

?

 

[ukeman]

18490 is not for your Reo Grand anyway...

what is the AMP limit on the AW IMR 18650...?

18650 Orbtronic 2900HD (high drain) is up there
MNKE too.
and there's some Sony that's way up there.

Bishopeals says 5 sec draws are ok with AW, and with these others, you can go much longer... at that low resistance (sub .6) you don't need long pulls... (or yeah?)

 

[sbmqcy]

AW lists the AW IMR 18490 as 15C

Other sites list it as 8c

?

There was a whole thread that I found discussing this exact disparity. To my knowledge, there was no conclusive answer that ever came of it. So for safety sake, I've always stayed well north of .5 ohms in my mini. Given that on a fresh battery, even .8–.9 seems to be a touch too hot, I don't think I'll be getting down there anytime soon. Or at least until I have enough spare parts to play with drilling out air holes and trying long, long drip tips.


Sent from my mobile

 

[pdib]

UKE, I thought you knew all this stuff. You're so well versed in other aspects . . .

The AW IMR 18650 2000mAh is rated at 10A

But the AW IMR 18650 1600mAh is rated at 24A continuous (it's better for deep subΩ than any other battery, except the Sony)