Li-Ion Batteries - THE TRUTH

[let,there,be,vaping]

This thread also needs a healthy boost/bump.

Then again, a sticky would be marvaahleous!

(Yes, I know I misspelled that! It was on purpose.)

[jim420]

I guess we could put music to his lengthy post and it could be his Magnus Opus.

LOL--Just kidding...good info. Thanks.

[a2dcovert]

I don't know why the instructions that came with my Yeti's are completely wrong. The fact that they published misleading data is unfortunate. The Li-ion batteries have built-in protection circuits. When the charge reaches the maxium voltage the circuit shuts off the charging. Same happens when the minimum voltage is reached, the battery shuts down. You would have to defeat the circuit to do damage to your li-lion batteries.

Kevin

[scyllabub]

I've just published in my little eBay e-cig group the stern warning in Spikey's video to "charge for 12 hours or else" - thinking that it superseded the info given to us by Keef some time ago. Now I've got to go back and apologise. And I thought it didn't matter if the info wasn't strictly true because at least overcharging isn't unsafe even if it doesn't do any good - looks like that's not right either

Do you think we could have an AUTHORITATIVE, LOCKED STICKY so that no-one can confuse the untechie reader with counter-arguments and theories; and all misleading threads could be deleted?

scylla

[Shantyhag]

As I'm on the scintillating subject of my BRAND NEW EVO!, I would like to say that the initial charge the battery arrived with has already proved to be 6+ hours strong, and I've been using it almost nonstop.

[nebraskapuffer]

Gosh I know so much more about batteries now after reading all this.......but I don't now what is right or what is wrong. Am I the only one here more confused now than before reading?

By the way:

DYSLEXICS OF THE WORLD, JUST SAY ON TO DRUGS!!!

[ApOsTle51]

the op is correct

[scyllabub]

"Charge 'em little and often, when the light goes green, they're done".

Please, someone, tell me if I've got that wrong

scylla

[Kelemvor]

nothings wrong, you got it all right

and about the overdischarge, i change my batteries everytime the cig doesn't perform well. and i check the voltage very often and to 90% i read 3.6Volts.
as the discharge cutoff is on most 2.75V i bet most people change batteries earlier.
our e-cigs would not produce any vapor on that voltage.

[caesar]

Just my personal findings:

RN4081 batteries are cut off at 3.4V. I mesured a battery that I managed to open after the 20 quick led signs of the cig. (sadly destroyed in the process)
Confirmed by mesuring others while connected to the charger, yes I opened one of those too.
They tend to stop charging at about 4.17-4.21V.

Same story with a DSE901 USB charger, it stops at 4.19V

The circuit that controls the charging is a CN3052A, a chinese chip for charging Lithium batteries, designed to cutoff at 4.2V. (datasheet available online)
If you leave the battery connected to the charger and if it's voltage will drop, it will begin charging again but stop quickly at around 4.2V.

While in use, my two DSE901 batts tend to be cut off at 3.6V (measured in charger so maybe a little lower, like 3.5V when cutted off while vaping)

From my personal experience, RN4081 and DSE901 batteries are pretty well designed and protected.