Batteries

[duksauce]

So I have a bunch of sony vtc4 30amp batteries. The green ones. From a few different sources. All seem legit.
One I have been using appears to have a liquid or something underneath the green wrap at the negative end. Never seen this before. The battery seemed to be working absolutely fine however I decided to stop using it incase it is something serious. Let me know if you have ever seen anything like this before.

 

[Stosh]

Anything seeping or leaking out of a battery underneath the wrapper is a bad sign. batteries should never have any electrolyte leaks, it's a possible sign of the battery being over-stressed.

For the cost of a new battery, be safe and recycle that one, and replace it with a new one....

 

[duksauce]

Yeah. That is kind of what I figured was just curious what might have been causing it I guess it could be stress perhaps I should rotate batteries a bit more often.
All the builds I have been running should honestly be fine.

 

[Wraith504]

Post some pics.

 

[duksauce]

 

[Baditude]

Actually, its probably nothing more than the adhesive between the metal cell and the plastic wrap becoming loose and causing an air pocket.

It would be extremely rare for any liquid from the battery to leak from the cell body. The cell is metal and not likely to ever develop a leak. If a leak should occur, it would be from either of the caps on the end of the cell. A battery which may have vented could leak its contents, but then you would have noticed a marked difference in battery performance had that happened.



There are kits available to re-wrap your batteries, and I've read that some businesses will provide this service.

 

[realsis]

Sounds like it's time to toss that battery! I'm not exactly sure but the battery could be leaking. Is their any dark spots on the battery? Are you absolutely certain you didn't get juice on it? I thought these batteries were a solid and not supposed to leak but to be on the safe side I'd replace it with a new one. Maybe someone who knows more about battery chemistry will chime in but if it were my battery I'd try to be on the safe side and not use it. Hope this helps a bit.

 

[Maurice Pudlo]

I've seen a vtc-4 do this from the bottom. Not sure if the case was faulty or what, I've pulled it from rotation but would also like to know the cause. In this particular batteries life it has never seen a build anywhere close to its continuous rating, 12A max and thats assuming a huge error on my ohms checker and multimeter (0.5 ohms -.15 ohms for errors sake).

Maurice

 

[duksauce]

Well I mean.... if it is just an air pocket it should still be safe to use. I havent noticed any difference in battery function at all.

 

[Bunnykiller]

did you by chance stand the battery on end in a small puddle or wet spot on the desk? condensation from a cold drink? The fluid in the battery will have an oily feel to it...

 

[Wraith504]

Well I mean.... if it is just an air pocket it should still be safe to use. I havent noticed any difference in battery function at all.

I am on Baditudes side on this one. If the battery is holding charge and performing the way it should. Then it simply cannot be a leak.

 

[duksauce]

No it never sat in anything wet that I am aware of. I noticed the dark spot yesterday and used it pretty much all day today with no decrease in performance...
But upon looking again decided to try and get some feedback. Seems like it could definitely be air as opposed to liquid. I mean nothing has come out from the wrap at all.

 

[Jvalles95]

Mine has the same thing, i was curious about it, currently on a charger sp if it charges fully i think mine should be fine

 

[pnyc]

If it is a leak from the battery, you 'll observe corrosion within a few days. I wouldn't worry too much if it charges OK and shows no rusty spots.

 

[Taz Yung]

is normal, i just rewrap my battery

 

[reojoe]

I have about 6 VTC 5's and some 4's that have similar markings or spots I still use all of them.

 

[zoiDman]

View attachment 373930
View attachment 373931

It could be Nothing. Or it could be that the Battery is Physically Failing.

Why Fool around with it?

Dispose of the Battery Correctly and Buy a New One.

 

[EBates]

Unless there is some sign of damage or deformity in the battery case, the likelihood of leakage from the negative end of the battery is very small. Bad's theory of an air pocket under the wrapper makes much more sense.

 

[Stosh]

Reading this thread the guess at the cause may be stress, manufacturing defect, placing the battery in a puddle, shock, overheating. But we're all guessing.

A new battery at about $10, is the same as I used to pay every day for my smokes. If I'm putting it in my pocket next to my family jewels I'm willing to spring for $10, even if the battery may be fine, or if it's noting to worry about

 

[jbalduf]

Do you think your device may have leaked through the 510?