If they are li-ion batteries and not protected that would be worse, do NOT use unprotected li-ion batteries in mods. Those Ultrafire's are probably protected, but I still wouldn't use them.
There aren't high-drain batteries available at the high of a mAh. High-drain's are recommended for the VAMO. It may work, but I wouldn't use it.
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Then are they IMRs?
If they're not protected, then they should work in the Vamo.
But, it they are not IMRs and they are not protected, they should not be used in ANY mod.
Exactly, and these definately are NOT IMR batteries. If they are protected, they may work but probably not very well. If the are unprotected li-ion, they shouldn't be used period.
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Here's a link to a very important thread in the ecf library. Follow this advice before listening to what a vendor, me, or anyone else in this thread says will work in a device.
Rechargeable Batteries
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Most definitely IMR is the best option to date. I'm considering toying around with stacking for DC RDA on my Vamo and will get IMR if I do.
But you claimed an alleged unprotected battery wouldn't work
because it's protected.
Then when I pointed out that it's unprotected you jump to claiming being unprotected is worse when odds are protection circuits are going to cut off below what the Vamo needs.
If you want to claim IMR in all cases say what you mean, don't make stuff up like claiming something is protected when FastTech says it's not. If you have problems with the UltraFire brand, no problems there either, I wouldn't trust them.
I can't find anything on the drain of those batteries to know whether they would be safe or not. But blindly saying they have to be IMR or have a protection circuit to be safe in ANY mod is wrong. It may be safe, like saying to turn off your gas at the meter to avoid a house fire is safe, but it's still wrong.
As far as I know no eVics are sold with IMR (LiMN) or protection circuits as the official battery, they have ICR (LiCO) in the box and NCR (Li-ion). The way I understand it is LiCO is safer than Li-Ion and NCR has safety built in. Claiming LiMN only for mods with built in protection is outdated at best.
Plenty of Vamos are sold with 2 ICR 18350s so I'm sure some are stacking and I'm not reading about all the explosions. Sure the danger is there but there's also danger in almost everything, especially when stacking.
If I was to get 18350s from FastTech I'd probably go with
https://www.fasttech.com/product/1271001 just because that's what is being sold with their kits and we're not seeing complaints. Otherwise I'd run any battery I was considering through the Vamo Battery Thread.
If those are protected UltraFire 18350's I'd know they wouldn't work. There's two confirmations that protected UltraFire 18350's don't work in
the Vamo Battery thread.
But since FastTech says they will work if they don't they can be returned.