Just want to make sure I am safe

[KalebK]

I have an xtar WPII that I charge 2 18350s with the mod that I have and I just charged a pair of batteries. They usually get done charging at the same time and this time oneshowed green for a few minutes before the other one did. I just want to make sure this is ok, as I am new to big batteries. Better to be safe than sorry, right? Thanks.

 

[yzer]

Sounds OK to me. Each battery will charge at a slightly different rate: some are faster than others. Each bay of your charger works independently of the other and they may charge at slightly different rates as well.

Nothing out of the ordinary here. I've seen this all of the time. I individually charge up to six 14650 batteries at once and all of the batteries get done at slightly different times with slightly different final charge voltages varying between 4.13-4.20V.

 

[KalebK]

Sounds OK to me. Each battery will charge at a slightly different rate: some are faster than others. Each bay of your charger works independently of the other and they may charge at slightly different rates as well.

Nothing out of the ordinary here. I've seen this all of the time. I individually charge up to six 14650 batteries at once and all of the batteries get done at slightly different times with slightly different final charge voltages varying between 4.13-4.20V.

Ok cool, I thought it was probably fine but just wanted to make sure. You can never be too safe, right? Thanks for your respomse!

 

[KalebK]

Oops, double post. Wish ECF had the option to delete posts, or maybe they do and I just haven't figured it out. Lol

 

[KalebK]

I dont know why my tablet double posts sometimes but its rather annoying!!

 

[WillyB]

I have an Xtar WPII that I charge 2 18350s with the mod that I have and I just charged a pair of batteries. They usually get done charging at the same time and this time oneshowed green for a few minutes before the other one did.

You didn't provide any details. If you are using the pair stacked in a VV PV it's quite common for one to discharge more than the other. Mark them and alternate positions in the PV every charge.

 

[dspin]

Hope you are using a muli-meter checking them, need to check all batts before charging and after.

 

[KalebK]

You didn't provide any details. If you are using the pair stacked in a VV PV it's quite common for one to discharge more than the other. Mark them and alternate positions in the PV every charge.

I have the Ovale V8 and I was interchanging what side they go on in my device at first but it got way confusing. I never came up with a definitive answe, is this the same as stacking batteries??

 

[KalebK]

Hope you are using a muli-meter checking them, need to check all batts before charging and after.

I don't have a multimeter. My device has PWM so I figured I couldnt use it with my device and im not sure that I would even know how to work it. My batteries are only 2 weeks old and I always keep them in pairs (I have two sets). So I should be okay right?

 

[NickZac]

I don't have a multimeter. My device has PWM so I figured I couldnt use it with my device and im not sure that I would even know how to work it. My batteries are only 2 weeks old and I always keep them in pairs (I have two sets). So I should be okay right?

The biggest single concern with lithium batteries is usually overdischarge, which can cause an explosion that is violent by nature. A combination of battery & charger protection circuits, quality electronics, a multimeter, and user knowledge all combined into 1 is the best way to mitigate the chance of this happening. For lithium batteries, having a multimeter is a pretty critical component as you can ensure you do not overcharge, overdischarge, and that the battery health is where you intend (i.e.: you can check each battery in a stack mid drain to make sure there isn't a huge discharge difference between the two). Multimeters generally provide more detailed specifics than a built in battery monitor such as that on the Provari. Also, it is a good practice to manually verify battery function rather than relying on built in safeties only, given even protection circuits can fail.

 

[KalebK]

The biggest single concern with lithium batteries is usually overdischarge, which can cause an explosion that is violent by nature. A combination of battery & charger protection circuits, quality electronics, a multimeter, and user knowledge all combined into 1 is the best way to mitigate the chance of this happening. For lithium batteries, having a multimeter is a pretty critical component as you can ensure you do not overcharge, overdischarge, and that the battery health is where you intend (i.e.: you can check each battery in a stack mid drain to make sure there isn't a huge discharge difference between the two). Multimeters generally provide more detailed specifics than a built in battery monitor such as that on the Provari. Also, it is a good practice to manually verify battery function rather than relying on built in safeties only, given even protection circuits can fail.

So you are saying I should invest in a multimeter?? I dont even know how to work those.

 

[NickZac]

So you are saying I should invest in a multimeter?? I dont even know how to work those.

I would personally argue absolutely. You can get a multimeter for dirt cheap, and it has thousands of uses around the home. YouTube videos highlight each of the functions. Whether it is checking a cable or phone line to see if the cord is good, seeing if something is wrong with a wall socket, or checking to see how much life is left in a battery of virtually any size and type, the multimeter does this.

Super-T has a cheap digital multimeter for 10 bucks, which I own. While you can spend a few hundred dollars on a Fluke, the main differences are that the Fluke offers more advanced features, higher quality components, better accuracy, and the ability to have them re-calibrated a few years down the road. But for what we do with PVs and for most household uses, a cheap multimeter like the one from Super T works great and will last for years. My Fluke doesn't tell me anything more about the batteries used in PVs than the one sold from Super T.
Super T Manufacturing, Innovative manufacturer of electronic cigarette products.


My favorite intro video... (there are a few really good ones on YT but I think this is among the best)


It's also worth noting that you can verify cartomizer/atomizer resistance using a multimeter as well.