Battery Issue?

wmoyer2006 · Sep 25, 2014

Hey everyone. I'm new to this forum (posting) but have browsed it on and off for some time. I recently bought some new batteries and after a day I noticed some discoloration on the side of the battery. I was hoping to get some advice.

imgur.com/Rz0WeTP <--- photo of discoloration on battery.

I mainly want to know if it's safe to use. Thanks for the help

Setup:
K100 Mech Mod (Clone)
Brass Monkee v2 rda (Clone)
VTC4 batteries ONLY
Macro Coil Wraps, rarely Micro, usually 5/6 or 6/7 wrap.

Thanks for your help.

Wraith504 · Sep 25, 2014

takes a charge to 4.2... Holds a charge.... vapes good, Use it, discoloration of the wrapper and wrappers seperating creating air bubbles are common on the sonys it seems.

AzPlumber · Sep 25, 2014

There have been numerous reports of Sony battery wrappers discoloring just like yours. Lots of speculation on cause but no real answers. However, it does not effect their performance.

wmoyer2006 · Sep 25, 2014

Awesome dudes. Thanks for your help. It's awesome to know that people like you guys are out there lending a helping hand.

I appreciate the timely response. That was fast!

The Torch · Sep 25, 2014

First, welcome to ECF!

Does your mod get hot when using it? Do you know the actual resistance of your coil?

If it really is an authentic VTC4, I would tend to thing the discoloration was there as part of the shrink tubing and you just didn't notice it.

EDIT: I wasn't fast enough it seems...

wmoyer2006 · Sep 25, 2014

Thank you for the welcome!

I'm not 100% on the resistance unfortunately. I'm not sure where to even get a meter. I'm 99.9% sure it's authentic. I think it happened when I dropped it and it hit a peice of metal on my desk, causing an abrasion in the wrapping.

Wraith504 · Sep 25, 2014

wmoyer2006 said:
Thank you for the welcome!

I'm not 100% on the resistance unfortunately. I'm not sure where to even get a meter. I'm 99.9% sure it's authentic. I think it happened when I dropped it and it hit a peice of metal on my desk, causing an abrasion in the wrapping.

In that case, be a bit more careful. First you need to be able to check resistance of your atty so get a ohm meter or a digital multi meter, doesnt have to be expensive. Second. If your using a mech mod, the wrapper of the battery is important. if the battery case is exposed and contacts the inside of that mod, you will essentially complete the circuit since the positive contact is touching the positive battery and the negative(case) of battery is touching the mod, bypasses your switch and will autofire.

Wraith504 · Sep 25, 2014

You can buy shrink wrap cheap and rewrap your battery, Or in a pinch you can put a little bit of clear fingernail polish over it. keep it thin.

The Torch · Sep 25, 2014

+1 on getting a meter. Radio Shack, Wall Bart, any cheap meter is so much better than guesstimating when it comes to safety.

Look at the wrapping very closely. Any sign of silver and you want to take preventative measures. Even scotch tape will prevent unwanted shorts, just examine it every now and then.

wmoyer2006 · Sep 25, 2014

So, to continue this discussion, what is "safe" in terms of ohms?

Wraith504 · Sep 25, 2014

wmoyer2006 said:
So, to continue this discussion, what is "safe" in terms of ohms?

If your pretty new to building coils. Try getting yourself a 1 ohm setup to start. Can be duals single etc.? What kind of equipment are we talking about? mech? regulated? dripper? tank? etc.

Wraith504 · Sep 25, 2014

wmoyer2006 said:
So, to continue this discussion, what is "safe" in terms of ohms?

Technically speaking safe means building the resistance of your coils no lower than "X" number so you do not exceed the amperage limitations of your battery. for example.. .your vtc is rated at 30 amps. a .14 resistance with a battery at 4.2 volts will pull 30 amps from your battery which is at the limit of what the manufacturer recommends as safe. You will want to leave yourself some "cushion" If your a total Noob, keep it at .8 to 1 ohm

The Torch · Sep 25, 2014

wmoyer2006 said:
So, to continue this discussion, what is "safe" in terms of ohms?

I normally say that anywhere 1 ohm and up you don't need to worry. 0.7 is still good. But you use the right batteries, so we can delve a little further into the rabbit hole:

BACIS Ohm's law: volts / ohms = amps or volts / amps = ohms

The VTC 4 is rated at 30 countinuous amps (continuous is the key word, not burst or momentary or any other word that does not mean continuous)

4.2V / 30 amps = 0.14 ohms.

Since meters are never 100% accurate, rounding up to 0.2 ohms is still borderline. Keep it over 0.3 ohms to be safe. Your mod will also add a tiny bit of resistance due to materials, contacts, threads and everything that is in the circuit, including how tight the posts are. It is better to measure from post to post after mounting the coil as the final resistance is often lower than when measured directly on the coil leads. I personally recommend to keep it over 0.5 ohms for safety's sake.

You mentioned at least 5 wraps, but did not mention wire gauge, so I guess you are at over 1 ohm (possibly 1.5), which is good.

The Torch · Sep 25, 2014

Wraith504 said:
Technically speaking safe means building the resistance of your coils no lower than "X" number so you do not exceed the amperage limitations of your battery. for example.. .your vtc is rated at 30 amps. a .14 resistance with a battery at 4.2 volts will pull 30 amps from your battery which is at the limit of what the manufacturer recommends as safe. You will want to leave yourself some "cushion" If your a total Noob, keep it at .8 to 1 ohm

why do I keep posting long answers when I already know someone will beat me to it because I'm long winded?

wmoyer2006 · Sep 25, 2014

Setup is:

K100 Mech Mod (Considering picking up a box mod, maybe a Pioneer IPV2)
Brass Monkee v2 RDA (Dual Coils)
VTC4s only.

Right now, I'm doing macrocoils, 6/7 wraps.

wmoyer2006 · Sep 25, 2014

wmoyer2006 said:
Setup is:

K100 Mech Mod (Considering picking up a box mod, maybe a Pioneer IPV2)
Brass Monkee v2 RDA (Dual Coils)
VTC4s only.

Right now, I'm doing macrocoils, 6/7 wraps.

Long winded answers are good for me because I want to have a complete knowledge of what I'm dealing with. I appreciate both short and long answers, no worries - I read them all.

Also, my batteries have never gotten warm, let alone hot. I keep track of that pretty religiously. I'd like to keep my fingers.

(Pessimist here.)

Wraith504 · Sep 25, 2014

wmoyer2006 said:
Setup is:

K100 Mech Mod (Considering picking up a box mod, maybe a Pioneer IPV2)
Brass Monkee v2 RDA (Dual Coils)
VTC4s only.

Right now, I'm doing macrocoils, 6/7 wraps.

What gauge wire and what are you wrapping them on? You are probably well within your safe resistance with a 6/7 wrap macro. Unless your using something like 22 gauge.

wmoyer2006 · Sep 25, 2014

24 gauge Kanthol

The Torch · Sep 25, 2014

The coil diameter will also come in play; larger coils use more wire, which means more resistance.

24 gauge may take longer to get up in temperature, have you tried higher gauges? (the higher the gauge, the smaller the wire = easier to heat up, but more resistance, which is safer)

wmoyer2006 · Sep 25, 2014

I have a spool of 24 gauge but I haven't messed with it yet. Suggestion on wraps to get tons of vape? Love chucking clouds. :3

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