My 14500 bats keep dying.

[magus7091]

Ok, my bad, I see in the Q&A that it does. Ignore previous post.

 

[Kurt]

Thanks, WillyB! Mine come off the charger with green light at 4.21V in general, sometimes a touch less, but 4.21 seems to be what I most often read. Interesting the difference of 4.20 with 4.25. Almost equal until around 200 cycles, then big difference! I suppose if you could have the charger cap it at 4.00V it would be even better, lifetime-wise. But that 0.2V would make a difference in vaping.

Funny, I've used batteries all my life, of course, and never paid so much attention to them before...of course I never expected the wattage from batteries as PV demand. Save for my cell phone, I guess.

 

[Kurt]

I'm also thinking now that my 510 PT might have shortened its own batt's life by overcharging it. In the beginning I was amazed at how much better the PT performed than the regular batts, and it could be that the batt was getting charged too high. I never checked it, and my PTs do not charge batts at all anymore.

I have a Bartleby on the way, which has USB charging capability and uses the 14500 batt. Actually I had it, but the charging LED didn't work, so Jay is replacing it. Will have to check how it charges. I do think the charging was working, as I would get overloading warnings on the laptop USB port when I plugged it in...and I never got those with a normal 510 PT, so it was certainly drawing more current. My electronic logic might not be correct here...I'm not so electro-savvy as some here. But while I would like USB charging, I don't want it to kill off the batts too quickly.

 

[WillyB]

Thanks, WillyB! Mine come off the charger with green light at 4.21V in general, sometimes a touch less, but 4.21 seems to be what I most often read. Interesting the difference of 4.20 with 4.25. Almost equal until around 200 cycles, then big difference! I suppose if you could have the charger cap it at 4.00V it would be even better, lifetime-wise. But that 0.2V would make a difference in vaping...

From Wikipedia:

Lithium-ion cells are charged with 4.2 ± 0.05 V/cell, except for military long-life cells where 3.92 V is used to extend battery life.

Actually I had it, but the charging LED didn't work, so Jay is replacing it. Will have to check how it charges. I do think the charging was working, as I would get overloading warnings on the laptop USB port when I plugged it in...and I never got those with a normal 510 PT,

Sounds like there is something wrong with the charging circuit itself, the LED is not coming on because the charger is faulty. You should not be having any "overloading warnings" from plugging in the Bart. It's charging circuit should not be making any high current demands of your USB port.