cr123a won't fire atty

[erich]

So, I'm using 2 of Ultrafire cr123a linked below in a SB. The register 3.3v each on my fluke. They fire and vape well on a Boge 3ohm that measure at 3.2 ohms. However, on a drip atty advertised as SR that measures 2.7 on the fluke, nothing. Not a crackle... just silence. I'm guess that I'm running into the boundaries of what these batteries' protection circuit is happy with?

So, my question is: higher res attys or different batteries?

Ultrafire Protected 16340/RCR123A 3.0 V Li-Ion

[milo hobo]

Is you contact post making contact? I just recently had a similar problem, but it wasn't the atty or the batteries. I had a 510 to 510 extender that had the contact post recessed out of contact.

[MDethCKR]

^^ I have a lot of center post problems with contact. It's handy to have a thick paperclip to pull the pins down on attys/cartos. You can also gently lift the contact post on your SB with a eyeglass screwdriver (or small computer screwdriver).

[erich]

So, as a control test, I swapped out the 2 cr123a for a single 18650 without touching the atty, and the atty fires fine. Then, I put the pair of cr123a back in. No fire on the 2.7ohm atty. Switched it for the Boge carto without touching the batteries, and it fires fine. It's only with the atty and the 2 cr123a that it won't fire. The SB also registers 6.5v on a tester with no atty on it, so it's definitely making contact.

The contact post is solid as a rock, there is plenty of tension, and the batteries also have the positive nub.

[erich]

So now that pair quit firing at all on any attachment. It was chugging along on the Boge, then stopped. One of the two batteries registers flat 0.0v on the volt meter. Could this be a faulty prot chip, or have I fried it with 3.2Ω?

[Switched]

My guess - cheap batteries provide mediocre results.

[erich]

Ok, well going to give these a shot, since a lot of people rave about them AW LiFePO4 RCR 123

Maybe the extra $0.40 makes them less cheap. Would still like more conclusive evidence that the Ultrafire that many have also said were good are actually incapable of driving an SR atty.