Ultrafire 18650 4000 mah safe?

[humangraffiti]

Hey guys so my friend gave me this battery coz hes moving away for college and wont be needing it anymore, he used them for his high end flashlights. Would it be safe to sub ohm vape on this? I usually go as low as .3 ohms on both my stingray and chi you clones with the tobh atty and igo w.

Thank you so much!


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[CreepyLady]

You havent provided enough information to advise whether or not it is even an appropriate chemistry for vaping, however, general rule of thumb immediately excludes this battery from vaping use, much less sub-ohm vaping use- Avoid batteries with fire in the name unless you want one. Trustfire, Ultrafire, and Surefire are a second-tier name brand battery in terms of quality and safety. Not recommended. Great for flashlight use though

http://www.e-cigarette-forum.com/forum/blogs/baditude/4848-9-battery-basics-mods-imr-protected.html

 

[humangraffiti]

You havent provided enough information to advise whether or not it is even an appropriate chemistry for vaping, however, general rule of thumb immediately excludes this battery from vaping use, much less sub-ohm vaping use- Avoid batteries with fire in the name unless you want one. Trustfire, Ultrafire, and Surefire are a second-tier name brand battery in terms of quality and safety. Not recommended. Great for flashlight use though

http://www.e-cigarette-forum.com/forum/blogs/baditude/4848-9-battery-basics-mods-imr-protected.html

Thanks! Wow i didnt know that i have trustfire that i actually bought from my B&M but i use my vtc4 as my main tho. Thanks!


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[mark-in-dallas]

The current ratings (mAh) on those batteries is heavily inflated and is usually less than 1/2 of what is stated, and the discharge current rates are dismal.

 

[JohnnyDill]

The current ratings (mAh) on those batteries is heavily inflated and is usually less than 1/2 of what is stated, and the discharge current rates are dismal.

^^^What he said.^^^ For an example, I have some UltraFire "3000mah" 18650's that came free with an awesome Cree flashlight. They last less than half as long as a genuine AW IMR 2000mah batt of the same size. They take less than half the time to charge, too. I NEVER use those UltraFires in my mech for obvious reasons. Fine for backup in my Vamo, though.

 

[619BigHouseCollective]

Does anyone know the amp ratings on the ultrafire "4000mah" blue batteries? I didn't do my research and bought 2, but am using in a vv at 1.8ohm...

 

[PLANofMAN]

Does anyone know the amp ratings on the ultrafire "4000mah" blue batteries? I didn't do my research and bought 2, but am using in a vv at 1.8ohm...

Any variable voltage mod will perform at it's best using high drain IMR batteries. I'm guessing you've done your research and know that now... The trouble is there IS NO Ultrafire. ALL their batteries are some (junk) they found and shrink wrapped it. You can get 2 different batteries from the same batch. There is absolutely no telling what you will get.

You didn't tell us what voltage you are vaping at, so I used a standard 4.2v calculation. Using a 1.8 ohm coil at 4.2v, your device is drawing 2.33 amps. The protection circuit board on the batteries will kick in at 2.5 amps, if it's like the other UltraFire batteries out there. So 4.5v will be your upper limit, as you will be drawing 2.5 amps at that point.

As the battery drains, the amperage draw from the battery increases, so your "real world" upper limit will probably be closer to 4.2-4.3v. That will be pushing those batteries. I hope you see why "-Fire" batteries are not recommended for high drain, high amp requirements like vaping. 4.2v with a 1.8 ohm coil is considered to be in the normal vaping range of the average vapor, but it pushes those UltraFires to the ragged edge of destruction.

Mah ratings are often inflated. No one makes an 18650 that has a capacity of more than 3600 mAh and those are just starting to trickle out - by Panasonic. Panasonic 3400's are fairly easy to get now.

 

[619BigHouseCollective]

Thank you, I have the sigelei lambo and with this battery I have fired pretty low coils (.2ohm) before research. I now know I got lucky.... But I do normally stay around 4v with 1+ohm coil

 

[619BigHouseCollective]

What your saying is they stop at 2.5amps? Sorry to double post

 

[PLANofMAN]

Please re-read my post above. I edited it extensively. If it is a protected battery, then yes, it most likely has a 2.5 amp limit circuit board. From what I've been able to tell, the protected li-ion Ultafire's are in black and gold wrappers, while the unprotected one is in a blue wrapper.

The actual mah rating on those batteries is around 1600 mah. If it is an unprotected Li-Ion battery, I would only use it long enough for replacement batteries to arrive and then either only use them for flashlights, or throw them away (at my nearest battery recycling center).

Unprotected battery amp limit reached = run the risk of the battery getting very hot, potentially melting/leaking/exploding. Most 18650 batteries have an amp limit of about 6 amps. Assume these have an amp limit of 3 amps and work within that range and you should stay out of trouble.

Edit: That means no going below 1.5 ohms on your coils when using these!!!

You can look at the battery. If it has a little dip in the wrapper near the positive terminal, then it is a protected battery (has a PCB board) and likely has a 2.5 amp limit. If it is smooth all the way up, it's unprotected and (likely) has an amp limit somewhere between 3-6 amps.

 

[kosliev]

I would never, ever buy anything branded ultrafire, trustfire, whateverfire etc.
Just a big no no

 

[PLANofMAN]

I would never, ever buy anything branded ultrafire, trustfire, whateverfire etc.
Just a big no no

I wouldn't either, and he/she wouldn't have if he'd known better...at the time. The important thing is to determine how he/she can use them as safely as possible until he/she gets better batteries. The fact that these are being used in a regulated mod is good, as the mod will have multiple safety features to prevent or minimize battery failure.

 

[619BigHouseCollective]

Thank you very much, I just need to get a legit battery

 

[619BigHouseCollective]

Haha and am a guy. Definitely if I had done my research, I wouldn't have these lol