Anyone know where I can buy heat shrink tubing for 14650s?

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jb0nez

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Since your using the cheapest batteries available I'd suggest replacing them too. Ultrafire & trustfire batteries are about the cheapest batteries you can get. Which might explain the decreased life cycles your experiencing too.

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Well, they're actually the only batteries in 14650 available except the stock e-power and the low mAh IMR ones (and a few no-name ones on ebay for super cheap). And the one IMR I have doesn't work well, the e-power shuts off vaping about 2-3 seconds into each vape. Every now and then I'll hit a carto that it works fine on, but doesn't last very long It's my emergency backup. The trust/ultrafires are at least long lasting and pack a great vape for their short life span. Perhaps you're not aware that 14650s are not nearly as common and diverse as 18650s. If you happen to know of some super secret source for higher quality 14650s than ultra/trustfire I'm all ears. I've yet to locate one.
 

jb0nez

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Follow up for those interested. My tubing 23mm came. It is VERY thin, thinner than a piece of scotch tape. I only covered up the bottom 1/6th of my battery (to cover the slit where the PCB is), so I'm not concerned with insulation issues. It took 3 seconds with a hair dryer to melt it and shrink it down - My fingers didn't even get warm and I was holding the tubing in place. Considering that people vape in >90 degrees I have no qualms about exposing the very end of my battery to slightly higher temps for a few seconds. It still fits in my e-power. It works great - much better than when I had the slit covered with electrical tape, because I think the electrical tape still allowed some play in the PCB while the heat shrink actually pulls the PCB in closer to the battery.

In the future, the second a slit appears between my PCB and battery, I will repeat this procedure. It's so snug and so thin that if it were blue you'd never even notice it (but I ended up receiving yellow). All of the arguments against doing it in this thread turned out not to be relevant. But thanks for the input and discussion (and help).
 

Tanks

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OK.

Wrapping a potentially vent-able battery in anything other than the material it's designed to be wrapped in, particularly if you don't know the specs....like tensile strength and insulating factors/heat dissipation is a bad idea.

If it's designed for it, maybe OK...

Small tears and such have been fixed with small bits of tape. However, in general, get a new battery people, IMHO.

Shrink wrap IS designed for this application and it's what manufacturers use. The rubbery material on the outside of all good PV batteries (specifically, AW and TrustFire; the only brands I own) is Shrink Wrap.

Batteries get hot. They get hot when used. They get hot when charged. Heat can make them fail. Adding a wrap is more insulation. Also, that particular type of wrap shrinks with heat by definition. And...how do you intend to shrink it onto the battery? With heat?

A battery is not a screwdriver or a wire.

Tape, in small bits, probably won't have much effect. However, wrapping the whole battery in the wrong stuff is STILL a bad idea if you use the wrong stuff.

Some may work. Some....not. That battery is probably $5.00 new (and you got use out of it).

You're making assumptions/speculations based on pure ignorance (no offense; it's true.).

Shrink wrap only shrinks a certain amount. It does not continue to shrink, after a certain point, even if there is continual heat. Shrink Wrap requires very, very low amounts of heat to make it contract and the process of heating/shrinking the Shrink Wrap will not cause the battery to get hot if it's done correctly.

What would be the most advisable way of applying heat to the EHS to shrink it onto a li-ion battery? :blink:

I personally use a lighter but the way I do it, it only allows a very small increase in temperature (I heat it just enough to make it shrink by waving the lighter left to right only allowing the flame to touch the Shrink Wrap for >1second per pass)

OK, so let me get this right...

You re suggesting that someone go buy special low-temp EHS that is made specifically for wrapping batteries, then get a temp-controlled heat gun, to fix a well-used battery that could very possibly have been internally damaged by whatever caused the original wrapper to become compromised?

And you're saying this is just as safe and more cost effective than just going to a vendor and buying a new battery for, what $7.00?

Well, maybe when you've got 41 years of experience of other people (civilian and military employers) buying your gear, double-checking your work, and covering your .... when something goes south, that is an acceptable solution. But really, I don't think the average vaper--especially one who obviously doesn't know much about batteries--has the time, resources, equipment, knowledge, or time to bother with all that foolishness.

I'm the biggest cheapskate in vaping, and believe me, I try to squeeze every bit of life out of my gear. I've got Vivi Nova heads that are 8 months old that I've meticulously maintained and are still working--not because I can't afford new ones, but because I like the idea of saying I've got 8-month-old Vivi Nova heads still working.

But when it comes to batteries, I don't skimp and I don't cut corners.

And neither should you, "jb0nez". I'm 100% with "AttyPops" on this one.

Dude--just buy a new freaking battery...

No, you're putting words into his mouth. The only thing you need to buy to do this is shrink wrap

You ARE 100% with AttyPops; you're both speaking like you know what you're talking about when, in fact, your position is that of utter ignorance.

This is not any where near as complicated as you two are making it seem. All he is doing is putting a tube of rubber over his battery, applying a little heat (not even enough to make your battery as warm as when it's on the charger) and BAM! it's done.

Neither of you have an understand of Shrink Wrap nor do you understand the process of heating/shrinking it; please, in the interest of minimizing disinformation on ECF, do not speak on a topic which you do not understand.



OP, this website is the best possible supplier I have found. All-Battery.com - Rechargeable batteries & Chargers - PVC ShrinkWrap

The Shrink Wrap sold at the link above is sold specifically for building your own batteries.
 

jb0nez

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Thank you Tanks, glad at least someone else sees the logic in this. Why would I throw away a perfectly functioning $7 Li-ion battery for a cosmetic defect? (One which if left unaddressed allows the PCB to pull away from the battery - and I'd consider that a more dangerous situation! Plus it does break the battery then.)

I bought the shrink wrap from ebay that someone linked to earlier - it's like 3 meters for $1 including shipping!

And as I mentioned, I only shrink wrapped the very bottom of the battery, not the entire thing, so that whole insulation argument is moot. And like you mention Tanks, it requires very little heat. The second I pointed the hair dryer at it it began to shrink, I just quickly rotated and it was done. So the heating of the battery argument is moot.

So just for future reference - 23mm EHS for 14650s.
 

Tanks

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Thank you Tanks, glad at least someone else sees the logic in this. Why would I throw away a perfectly functioning $7 Li-ion battery for a cosmetic defect? (One which if left unaddressed allows the PCB to pull away from the battery - and I'd consider that a more dangerous situation! Plus it does break the battery then.)

I bought the shrink wrap from ebay that someone linked to earlier - it's like 3 meters for $1 including shipping!

And as I mentioned, I only shrink wrapped the very bottom of the battery, not the entire thing, so that whole insulation argument is moot. And like you mention Tanks, it requires very little heat. The second I pointed the hair dryer at it it began to shrink, I just quickly rotated and it was done. So the heating of the battery argument is moot.

So just for future reference - 23mm EHS for 14650s.

I'm willing to bet money that the battery gets hotter when charging than it did when you were heating the shrink wrap.

I can understand why they think it's a bad idea because, if you don't understand shrink wrap and have never used it before, it sounds like a bad idea. But, if you understand how shrink wrap works and what it's designed for, it's a great idea!

This forum has a very big problem with people giving advice on things which they don't really understand. Even when told the truth they still ignore it and continue spreading inaccurate and incorrect information. It happens all the time and it's quite sad - "newbies" don't know the difference between and ignorant person BS'ing and an experienced person sharing their knowledge.
 
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