Li-Ion Batteries - THE TRUTH

[scyllabub]

I think that's the model that I know as the Evo. I wonder if you might find help amongst this lot of threads:

M-401/402 "Mini" & M403 Super Mini - E-Cigarette Forum

You might find info about similar experiences just reading it through.

Also, the site you bought it from might have their own forum where you're sure to "meet" fellow owners.

I'd be pulling my hair out (and maybe even smoking ) if I were you. Good luck, magnetitis

scylla

[Doublexl85]

YES!!!! I knew it, everyone gave me crap for charging lithium batts over night. I WINS haha

[NatureBoy]

good post, thanks OP

[Pegasus7]

Thanks All for posting....
Good info.

[Mr. Mom]

Great post. I use lithium polymer batteries to fly my rc airplanes and this indeed the truth. 3.7 volts is the nominal voltage for a single cell. Fully charged is 4.20. Don't discharge below nominal voltage and store them at about 3.85 volts. A lithium battery works best if you recharge them when they show the slightest signs of low performance.

[tsmith35]

Be careful when storing lithium batteries. If shorted, they can explode. If you keep one in your pocket, make sure nothing else metal is in that pocket. Learned this from experience with flashlights.

[Quick1]

Wow. Just found this thread and read thru it. Allow me to add my 2 cents' worth. I'm an electronics engineer and have designed Li-Ion and Li-Poly chargers (good ones).

Excellent post. Thanks.

I have a question about discharge rates. Is there a "rated" discharge rate for Li-Ions? Some max rate?

Normal 510 atomizer runs about 2.2 ohms. Is the discharge rate within reason? or only for short bursts. Sustained?

Even more interested in those used for operating an atomizer at 6v. 2 3v Li-Ions (CR2s for example). What's the discharge rate there? Within reason?

[Wings]

Excellent post. Thanks.

I have a question about discharge rates. Is there a "rated" discharge rate for Li-Ions? Some max rate?

Normal 510 atomizer runs about 2.2 ohms. Is the discharge rate within reason? or only for short bursts. Sustained?

Even more interested in those used for operating an atomizer at 6v. 2 3v Li-Ions (CR2s for example). What's the discharge rate there? Within reason?

All batteries have a recommended maximum discharge rate specified by the manufacturer so I can't make a flat statement about the discharge rate of all Li-Ion and Li-Poly batteries. For continuous use it's typically around the same as its rated capacity, and often more. For intermittent pulsed discharge, this rate is several times the rated capacity of the battery. Typically an 800mahr Li-Ion rechargeable CR2 can safely be loaded to 2.5A and higher for short periods. I wouldn't hesitate to load one to even twice that as long as I make sure it isn't on long enough to overheat the battery. As a rule of thumb if the battery is uncomfortable to hold, it's getting too hot.

As for your 2 CR2s driving a 2.2 ohm atomizer (3.3 amps), I'd do it and wouldn't worry about it.

[V4P3_V1CT1M]

Thanks for the good info! I just purchased an ScrewDriver and the mkII battery has been charging for over 6 hours and still isn't done charging. Can anyone tell me if something is wrong with it?

Thanks in advance,
Brett

[Quick1]

Thanks for the good info! I just purchased an ScrewDriver and the mkII battery has been charging for over 6 hours and still isn't done charging. Can anyone tell me if something is wrong with it?

Thanks in advance,
Brett

I'd say yes, there is something wrong with something.

Look at the mAh on the battery. Look at the mA output of the charger. Divide the mAh on the battery by the mA charger output. That's about how many hours it would take to charge a drained battery.

The capacity rating on the battery is listed as the current draw that will drain a fully charged battery in 1 hour. It pretty much works in reverse when you're charging it. (and you generally don't want to fully recharge a drained battery in less than an hour).

1) could be that it's done charging and there's something wrong with the led on the charger.
2) could be the charger is broken.
3) could be the battery is bad (the battery should not get more than warm even when charging at the max rate). Pretty much max rate charge is 1 hr.