Battery safety questions

[VapeMate]

Hello vapers,
here i am, again with some new questions, safety ones

1.Is it really possible to overcharge a Li-Ion battery with a Li-Ion battery charger?
AFAIK a battery charger has many protections, one is overcharge protection, it checks for some standard values in battery to know if it's fully charged or not, so i don't believe this is possible (well i mean, the chances are veeeery low, not?)

2.How is it about charging with cable inside the mod? Is it safe? for example, my mod charges thru usb 5v 1A, i read the datasheet for my battery(which is Samsung 20R) and it says the standard charging is "CCCV, 1A, 4.20 ± 0.05 V, 100mA cut-off"

thanks in advance

 

[Mike H.]

You want a reputable charger just like you do batteries....we cant predict if or when one might fail and not be safe but thats the chance we take and why we choose a quality name brand...Ebay trustfire and many other names with "fire" in it are garbage..Only trust the 3 i listed below.

Charging through the mod i personally never liked as its not as good a quality charging circuits in general..Some work good some dont but most horror stories you may hear from a fire was from charging through a mod itself.

Efest LUC, Nitecore i2, d2, i4, d4 and the Xtar chargers are the top 3 to purchase from..Nitecore models being the least expensive...I own 2 nitecores and theyve never let me down.

 

[outwest]

That's exactly it. It all depends on the charger not going crazy. I had an Xtar VP4 go wonky and start over charging the batteries that were in it. Luckily I caught it when they were just barely over charged, unplugged the charger, plugged it back in, and it worked fine afterwards. I don't know what caused it to begin to overcharge, but it only happened once. However, once it all it takes to start a fire in your house.

My Efest Blu6 charger has been working like a champ.

Whichever charger you go with, be sure to get one that has a readout showing the current charge level of the batteries so that you can keep a better eye on it and so that you can easily see what charge your batteries have.

As for charging inside the mod - I dont trust it. There was one mod that became famous for problems when charging through the usb port (I think it was the istick?) and I've personally seen where a multi-battery mod didn't charge the batteries evenly (one battery was fully charged while one was left way under charged). That imbalance in charge can be a safety issue.

 

[Enrocc]

Everything I've seen leads me to stay away from charging by cable unless the mod runs in parallel. It seems to stress the mod and reduce overall longevity. My Nicole charger also stops when they're full and I like having that piece of mind.

 

[Rickajho]

1.Is it really possible to overcharge a Li-Ion battery with a Li-Ion battery charger?

When it comes to electronics anything is possible. A properly working charger won't over charge a battery during the charge cycle. The depends on 1.) The charger being designed properly to begin with. Certain brands have had more than one model released into the market that had to have a "v2" quickly released to fix charge circuit design flaws that should have never made it out of the r&d department to begin with. 2.) The charger continuing to work properly or having failsafes built in to shut it down if there is a component failure.

Almost all chargers continue to leak a small amount of current into the batteries after the charge cycle has ended and some are a lot worse than others about this. Because of this it's still best practice to pull the batteries off the charger ASAP at the end of the cycle. Leaving them sit in the charger could put them over voltage in less than 24 hours, depending on the charger.

Technical reviews are your best friend: http://www.lygte-info.dk/info/indexBatteriesAndChargers UK.html

2.How is it about charging with cable inside the mod? Is it safe?

That's really device dependent. A lot of them don't implement charging properly. Joyetech seems to get it right but there are so many that don't seem to do it correctly that the best general advice is don't rely on internal charging whenever it can be avoided.

 

[VapeMate]

That's really device dependent. A lot of them don't implement charging properly. Joyetech seems to get it right but there are so many that don't seem to do it correctly that the best general advice is don't rely on internal charging whenever it can be avoided.

the problem is many many people have told me that if it's a one-battery mod, it's ok cause you're not gonna imbalance anything and it's safe, but yet an external charger is recommended. :|
anyway, thanks everybody, i guess i'm cannot take the risk to lose my lovely mod or hear parents nagging and shit over me.the market that am dealing with here, is so overpriced on brand chargers, so i'll be going to look for some components and build my own charger then. also gonna make my own resistance meter. i will share it with you guys when i'm done with 'em