Stacking RCR123a 3v 900ma Batts overstress?

[rhsmitty]

Hey wise ones,

Looking at getting 2 16340/RCR123A Tenergy Li-on 900 ma batteries and stacking for 6v on a rough stack. I cannot not find discharge/C rating for these. Are they overstressed in this config ? 6V at 2.5 ohm atty is 2.4 amp draw.

Are there high drain 16340 3v batts ?

 

[Papa Lazarou]

As far as I can see Tenergy do not provide a C rating for these batteries. Perhaps contacting them directly would be worthwhile? They are protected, which is good. They do have over current protection which cuts in at 3 Amps. http://www.tenergybattery.com/index...facturer_id=0&option=com_virtuemart&Itemid=27 You would be running them at about 2.6C, and while I am not a battery expert I do think this is likely to be pushing it. At the least it will shorten the batteries service life.

There are no IMR high drain batteries in 3V as far as I'm aware, but LiFePo4 batteries do support higher discharge rates in general than Li-ion's. For example the AW 3V LifePO4's use a safer chemistry which will not vent with flame, and this thread on CPF Marketplace shows discharge curves for this battery all the way up to 10C (5 Amps).

If it were me, I would probably go with the LiFePO4's. They are a lower capacity, but for that you get a safer chemistry which will support the discharge rate that you require.

 

[buGG]

+1 on the AW LiFePO4 batteries...in an Ikenvape thread, the manufacturer was contacted a couple months back and stated that those Tenergy Li-ions have a 1C discharge rate, so .9 Amps (if you believe they are 900 mAh), when minimally 2.4 Amps are desired for your atty.

 

[rolygate]

Watch out for the charger if you get Li-FePo4 cells. They are 3 volt cells, unlike most others which are 3.6v cells, so standard chargers can't be used. More info:

http://www.e-cigarette-forum.com/forum/ecf-library/129569-rechargeable-batteries.html

You could use AW 16340 IMR Li-Mn cells if (a) they'll fit lengthwise, and (b) you use an HV atty:

AW IMR16340 550 mAh IMR CR123 size LiMN Rechargeable Lithium Battery

When paired, these cells would give a fresh off-charge voltage of 8.4v and a working voltage of 7.4v. They are most likely the safest / high-power option (an 8C rating) and use a standard charger, but the volts are high.