Battery Safety Question

[Eximius]

I was building my first coil and I thought I was doing good, the coils were a little bit spaced out but not to bad. I got it to fire decently even, loaded her up with cotton and took a few good rips. It was ok but I decided that I wanted to re-wick it, I took the cotton out and once the cotton was out I wanted to make sure the coils were firing evenly. I get her a few fires, warmed them up tweaked it a little. I got the coils pretty warm trying to mold them and I noticed a little flame spark up, I quickly blew it out. I fired the coils again and a small flame lit again. Now I was really heating these coils up but my concern is my battery warmed up. It was warm to the touch so I pulled it. 5 mins after the battery had cooled down. Is this battery still safe? Should I chuck it to be safe. My coils didn't cross and I don't think they coils where to close to the posts. I'm using purple efest 35 amp IMR's.

 

[Rat2chat2]

http://www.e-cigarette-forum.com/forum/batteries-chargers/587759-purple-efest-18650-battery-warning.html

I would read and do some more research regarding this battery. I am sure someone that knows a lot more than me will come along and help you. But until they do. . . I would not use it. I could be totally wrong and welcome the chance to learn more about this battery from someone who does know. Sorry. But it is better to put safety first.

 

[gratefulbuddy]

what did your build meter out at?

the flames happen when dry-burning after juice has been applied previously. Just blow it out quickly to prevent damage to insulators and the like.

warm battery is no big deal. Hot battery is a bad sign. Measure the voltage of battery. If it's above 3.2 volts - throw it on the charger.

Nothing here sounds abnormal but safe advice is kind of sketchy dependening on the resistance of your build

 

[Ryedan]

I was building my first coil and I thought I was doing good, the coils were a little bit spaced out but not to bad. I got it to fire decently even, loaded her up with cotton and took a few good rips. It was ok but I decided that I wanted to re-wick it, I took the cotton out and once the cotton was out I wanted to make sure the coils were firing evenly. I get her a few fires, warmed them up tweaked it a little. I got the coils pretty warm trying to mold them and I noticed a little flame spark up, I quickly blew it out. I fired the coils again and a small flame lit again.

The flames are perfectly normal. What happens is that because there is very little juice on the wire, the wire gets really hot. It does not get anywhere near that hot when you put a wick in there and wet the wick.

Now I was really heating these coils up but my concern is my battery warmed up. It was warm to the touch so I pulled it. 5 mins after the battery had cooled down. Is this battery still safe? Should I chuck it to be safe. My coils didn't cross and I don't think they coils where to close to the posts. I'm using purple efest 35 amp IMR's.

What is the resistance of the build you have in there? Those Efest are really 20 amp max, not 35 and the link in Rat2chat2's post goes to a thread where that is talked about. That means you can use them down to about 0.25 ohms and they will not heat up. Below 0.20 they will start heating up and that's not recommended. Get them too hot and they will vent which is not safe.

You say the battery was warm to the touch. Could you have held it with a firm grip for a minute? And what was the battery voltage after all this happened?

 

[Eximius]

The flames are perfectly normal. What happens is that because there is very little juice on the wire, the wire gets really hot. It does not get anywhere near that hot when you put a wick in there and wet the wick.



What is the resistance of the build you have in there? Those Efest are really 20 amp max, not 35 and the link in Rat2chat2's post goes to a thread where that is talked about. That means you can use them down to about 0.25 ohms and they will not heat up. Below 0.20 they will start heating up and that's not recommended. Get them too hot and they will vent which is not safe.

You say the battery was warm to the touch. Could you have held it with a firm grip for a minute? And what was the battery voltage after all this happened?

I was at .40 ohms on my build which from what I understand should be in the safe zone for these batteries. And yes I could hold it with a firm grip no problem, I'm just concerned about how hot is too hot. In other words how could I measure it. Also how can I tell if my battery is venting?

 

[DreamWithin]

I'm just concerned about how hot is too hot. In other words how could I measure it

If it's too hot to touch comfortably, then it's "too hot". I know, it's not the most scientific method. Maybe someone will have the answer there on temperature thresholds, I just don't have that info myself.

Also how can I tell if my battery is venting?

If it ever came to that, you'd know. This would be catastrophic failure of the battery. A venting battery will expel hot gas, way too hot to even get close to, let along hold on to. Just Google for "venting battery" and you can see some examples of this.
Hopefully none of us will ever experience that