Tenergy RCR123A batteries

[CatVTTV]

I bought a Multi Meter when it was advised, and honestly I had some real fun with that, as no one told me that I had to take the caps off the needles.....hahahaha

But for the life of me, I have no real clue what I am doing with it.

If I have a battery that is 3.7v and I test it, it sometimes reads 4.4v and so on.. and if I test it again when its used, it will read 3.5v or so.. but what that is telling me, I really dont know..

I really want to get a full understanding of batteries, and I wont give up till I do understand them fully.

I like that last gadget funky... that looks so easy to use..

 

[funkybozu]

lol it is, but its only usefull to finding out the charge status of the batt

your DMM does the same thing kind of
lets say youve just charge a 3.7V batt, you should get 4.2V on the DMM, anything over that like 4.3V then chuck the charger and the batt, they risk blowing up, well the batt anyway,
you should not havethat problam with a PCB batt sinse it will cut off before it gets too high.

anyway once you start using the batt you should notice a quick drop to 3.8~9V
that is your batts cruising speed(volts that is), the higher the mAh the longer the batt can run at that voltage without a drop.

good lion batt will drop drasticly near the end of their run time, it should drop in stages like from 3.8 to 3.5 then 3.2, that an approximation but thats how my good ones do it
i charge my batts when they drop to 3.5
a not that good lion will do the drop gradually, instead of flattening out at 3.8
it will carry on droping slowly 3.8/3.77/3.75.....etcs
a bad lion just wont hold a charge

its the same for 3V lion, the full charge is 3.6 but that is dangerous so most chargers wont go over 3.4Vs they bottom out at 2.2V(2.75V for the 3.6V)
same deal my good batt will stay at 3.1~2for a long time then die they drop to 2.5 or 2.7 that when i charge em.

as a side note , no 2 batts are the same so when you use them like in a 6V GG set up
one of them is going to die before the other, one will show on your DMM 3.2 and the other should show 2.5 or so, when that happens as an overall Volts you will still have
5+Vs but the difference in V of the 2 batts will stop your GG from working properly
if you test the 3,2 on on the ZTS you will see that it barely has a charge left as well
you cant tell on a DMM sinse they stay at their cruising volt till the very end

 

[CatVTTV]

Thank you for your patience Funky.. it is getting through.slow but sure.. Bit like a good battery...see Im learning..

I always check my batteries after a charge.. just to be sure all is as it should be. There were a few 3.6v ones that got chucked out.. as they were discharging way too fast.

 

[funkybozu]

how are the tenergy holding up?

 

[funkybozu]

oki so update on these batts
i got 4 to try em out and they do work
there are a few things you should know about theses batt though
firstly they need the tenergy charger, it charges to 4.4Vs it seems nessesary for these batts cause they are 3.6V batts fitted with a FET to lower the voltage
the FET starts to work only under load(0.7A + to start working) so when you use a DMM
to see what Vs the batts are at you get wierd reading
apparently if the DMM shows 3.9V then you batt is fully charged

just as a comparision normal 3.0V batts ned a charger that does 3.6V no more or they explode
3.6V batts need a 4.2V charger or they explode
all ultrafire chargers are either 3.6 or 4.2
never ever charge ultras and such with a 4.4V charger or they will explode

other than that, these batts need to be cycle when first used, thats 5 charges to get
your max mAh, after that your good
also it takes 12mS for the FET to start to drop the current. it doesnt seem like very long
but for 12mS your atty is getting a full 7.4~8.4V , not much of a prob if your atty is nice and wet but dry, you might burn it out

the real advantage though is that they be protected, they wont blow in your face
supposedly and they can pump out 3C apparently so you know your atty is getting the
current it need to fonction

 

[tribalmasters]

3C? Thats good enough for me! Does anyone know if the 3vCR2 batteries from DX really are 3 volt cells? Perhaps these have a FET inside too! I have never ever seen another 3v lithium Ion cell is it even possible for one to exist chemically?

 

[CatVTTV]

Funky... I have not used them for a week or so, Im enjoying the vaping time of the 18650's far too much... they last forever !

Yes, when I bought those Tenergies, I bought them complete with their own charger. I should have emphasised that point.. thanks for doing that.

 

[funkybozu]

3C? Thats good enough for me! Does anyone know if the 3vCR2 batteries from DX really are 3 volt cells? Perhaps these have a FET inside too! I have never ever seen another 3v lithium Ion cell is it even possible for one to exist chemically?

apparently yes there seems to be a lion that is chemicly 3.0V......
but i suspect they are mainly or only primaries
seems like the main diff in 3.0V lions is that they either use a resistor or a FET to drop the V

 

[CatVTTV]

Trible, my fingers type out some drivel at times...3C??? no idea what that is about...hahahah