ok battery size help please...

[kaos731]

I have a small LED Flash light that I would like to mod into an e-cig.

It has a round battery holder that will hold 3 AAA batteries in series, I know I could just slap 3 10440 inserted in Parallel for a 3.7 1800 mah tooter. But I would like to do a single battery mod for this with the highest Mah ratting possible.

What size battery would fit an LED min flashlight that holds the tubular style 3 AAA battery holder?

OR

Do they make 10440 1000 MAH batteries so I can parallel them to 3000mah?

- Kaos

 

[VPJUNKIE510]

I'm not sure the exact measurements but you might be able to fit one 14500 in there

 

[jmanning]

Possibly an 18500

Sent from my Dell Streak 7 using Tapatalk

 

[Rocketman]

You could just put an Avery address label on your 600mah 10440 cells and call them 1000mah.

Sort of what the manufacturer did with the 300mah 10440 cells you have

Think about it. If a 10440 cell is 600 mah, why are most 14500 cells between 600 and 700 mah?

and yes an 18650 fits in a 3 AAA flashlight (see my profile album) but an 18500 would be easier.

and using the Avery label trick you could make it a 3000mah 18500 mod

(hope you can read between the sarcasm )

 

[kaos731]

lol I see your sarcasm, and raise you with a rhetorical question....

18650 has up to 3000 mah correct?

do you know exactly the length of one from tip to ....?

Thanks

- Kaos

 

[mv2envy]

Well the only real 3000mah 18650 is the Callies Kustoms 3100mah panasonic cell which is 69mm long! The next closest battery is the AW 2900mah cell which is 68mm long. An AW IMR18650 is 65mm long but is only 1600mah.

 

[WillyB]

do you know exactly the length of one from tip to ....?

The lengths will vary by as much ~3mm. Figure about 68mm for 18650 protected cells.

The little plastic 3 cell carrier in those flashlights is just about the same length as an 18500, ~53mm.

An 18500 is a decent cell, especially with LR offerings. Not only better vapetimes than a 14500 but higher initial loaded volts.

I'm too old to try to cram an 18650 into a torch, that's Rocket's specialty.

And I never use the original PCB (especially useless as a source of GND). You can make one out of almost anything. A common nut/bolt makes a good terminal, there is no reason to have a spring on both ends like the torches use for their carrier.

 

[Rocketman]

Most 3000mah cells you see are not.
(except the really expensive ones)
The Ultrafire Big Red 3000 is about 2200 to 2400mah at best and has a current limit of about 2.5 amps.
Many knock this cheap cell because it can't handle high powered flashlights or LR vaping.
No kidding folks. It is not a "low internal resistance" cell but has a properly configured low current protection circuit on it.
It is not designed, or capable of supporting a severe application. It will fail if you abuse it.
In fact,,,,, most failures have been in $100 flashlights in a stacked battery configuration.
The protection circuit has been blamed for problems with this cheap cell. It seems to always cut out when drawing more than design current. Go figure.

Internal cell resistance also becomes important as current draw does up. Higher current applications need a over current trip point higher than 2 to 3 amps. That's the reason for the extra mosfet switches on the protection board. 1,2 or 3 switches for a max of 3, 6, or 9 amps.

Knock the cheap cells all you want. Just don't try and use them when your application calls for a cell with higher capability. You want to run a big flashlight? Get a better cell. Run LR atties? Get a better cell. Run stacked Li-ion cells? Run for the hills

Why don't you folks knock the vendors that sell the $3 to $4 cheap cells at $10 to $14?
If I had to pay $13.99 plus shipping for a Ultrafire Big Red, or $16.99 for a AW cell, which one would I choose? But at 4 for $12, and a lower current application, which one now?

Don't do cheap for high demand applications.

 

[Bardolf Blaze]

According to the size of the insert, you might be able to fit a 25500 in there. Easy way to check, grab a C battery and see if it fits.

 

[Rocketman]

Tried, don't fit
One thing to remember with a metal mod is to insulate the inside surface so you are not depending on just the plastic wrapper. One little nick in the wrapper can short out a metal mod. Even just a rolled up playing card works.

 

[kaos731]

ok Guys thanks for all the help and Rocket thank you for the spec info on these.
Upon your reply I went and did a little research and settled on a pair of these:

TrustFire Protected 18650 3.7V True 2400mAh Rechargeable Lithium Batteries (2-Pack) - Free Shipping - DealExtreme

These seem to be the best option for my project. I have also rethought the whole flash light mod and decided I don't want a tube mod as badly as I thought. I stopped by my local Rat-shack and picked up this nifty project box:

Project Enclosure (3x2x1") - RadioShack.com

This project box looks like it'll fit 2 18650's. I can then parallel them and add a female RCA connector in it (Hot Wired) so I can use an RCA to 510 connector so I can use my eGo quick usb charger.


- kaos

 

[Rocketman]

kaos,
how about these cells. DealExtreme might come in before Christmas.
TrustFire Protected 3.7V 2400mAh 18650 Lithium Battery (2-pack)

How about an eGo connector from GoodProphets, and an extra 510 connector to hook up your eGo charger.
The eGo connector is fairly "meaty", and is "sort of compatible" with eGo type cartos.

 

[WillyB]

I stopped by my local Rat-shack and picked up this nifty project box:

Project Enclosure (3x2x1") - RadioShack.com

This project box looks like it'll fit 2 18650's. I can then parallel them and add a female RCA connector in it (Hot Wired) so I can use an RCA to 510 connector so I can use my eGo quick usb charger.

That's gonna be a bit tricky.

Those cells are about 68.4mm. The ID of that box is ~71.1mm. Two cells side by side will leave you with about ~8mm for the rest of yor stuff. A 510 connector is about ~10mm across. That's assuming you completely gut that box.

Do yourself a favor and go get the larger RS box, the extra inch in length will make a world of difference and you won't have to completely gut it.

 

[mv2envy]

1"x2"x3" is not big enough!!!! I have 2 dual 18650 VV mods built into 1"x2"x4" RS project boxes and those have just enough room for batteries and electronics.

 

[kaos731]

kaos,
how about these cells. DealExtreme might come in before Christmas.
TrustFire Protected 3.7V 2400mAh 18650 Lithium Battery (2-pack)

How about an eGo connector from GoodProphets, and an extra 510 connector to hook up your eGo charger.
The eGo connector is fairly "meaty", and is "sort of compatible" with eGo type cartos.

Whoa! thanks for the heads up there Rocket. I didn't realize DX was in Hong Kong!

Oh I do not want to use any type of 510 connector for charging other than the connector that is for the atty. The reason why is if I loan this to anyone I want to make sure they don't stick a carto into hot port and fry an atty or burn themselves .

I have a male RCA jack on a 4' length of cable attached to a 510 connector already wired up, so a female RCA recessed jack is a perfect charge port with no danger of one of my not so smart friends being able to stick an atty in it. lol

And willy you might be right on the space, but I would like to keep the 3" length form factor as much as possible. if two will not fit I can always just use one. lol these trust fires appear to be a TRUE 2400 mah rating and 2400 mah is a good chunk of vape time. I can live with 2400 mah if need be. Heck with the charge port and the ego charger attached to it I can use it as a pass through if I have to. lol will just need to use a 3 ohm carto or higher when I do because i will be then vaping at 5 volts off the usb.

 

[Rocketman]

OK on the RCA.

I made a stereo amp for a motorcycle once, had an RCA jack for each channel and one for the power.
I'll not go any further

 

[Rocketman]

OK on the RCA.

I made a stereo amp for a motorcycle once, had an RCA jack for each channel and one for the power.
I'll not go any further

3 X 2 X1 MIGHT BE SMALL.

3.15 X 2.17 X 0.98 is big enough.
Here's a cool aluminum one
of course from MPJA ")

3.15" X 2.17" X 0.98" ALUMINUM DIE CAST BOX-MPJA, Inc.

 

[WillyB]

Heck with the charge port and the ego charger attached to it I can use it as a pass through if I have to. lol will just need to use a 3 ohm carto or higher when I do because i will be then vaping at 5 volts off the usb.

Nope. You'll still be vaping off the battery.

 

[Rocketman]

I can tell the difference.
I get an EXTRA 0.04 volts when on the charger (with a 1.6 ohm DC).

That extra really gives it a KICK,


How many mah is a USB running off wall power?
(420ma X 24 hours X 30 days)

about 302400 for the whole month

 

[WillyB]

I get an EXTRA 0.04 volts when on the charger (with a 1.6 ohm DC).

I stand corrected.

I'll have to check my set-up, I'm pumping 600mA into mine (so the Chinese label tells me). Maybe I'll catch 0.05?