Whats the safest un-protected Li Ion 18650 when a protected one wont fit?

HighlanderNorth

Flashlight Enthusiast
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Sep 15, 2011
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Mid Atlantic USA
As I mentioned in a thread in the Cafe section about 10 days ago or so, I have stopped smoking cigarettes by switching to e-cigarettes. Incidentally, it was here that I first found out about the newer, more effective, non-disposable e-cigs, as I kept seeing links to e-cig dealers from people here talking about Li Ion batteries for sale. So I looked into one of these e-cig sites, and saw that there are now larger, more reliable e-cigs out there that actually work.

The first unit I bought that I now use every day has a built in 3.4 volt battery unit that doesnt come apart, so you just plug it in, but its only 650mah, and some times runs out before the end of the day, so I just found a slightly larger battery unit that has a removable 18650 battery capability. But I had previously also bought another variable voltage kit that also runs on 18650, BUT only shorter, unprotected 18650's will fit into it, and I worry that the new unit I am getting in tomorrow or Thursday might not accept a longer protected 18650 either.

ALL the Li Ion batteries I have bought in 4 different sizes are protected, and 90% are Panasonic. I really dont want to use/buy un-protected Li Ion batteries just for absolute safety. maybe I'm being a little too critical about protection, but I figure there must be a good reason they make protection in most Li Ion products in the first place. The reasons I dont use the other, variable voltage unit is because its solid steel, its larger, and the batteries that came with it are Chinese un protected Li Ions.

They say these devices should have high drain batteries. What unprotected, high drain 18650 batteries do you recommend? I know AW's are recommended, but there are some fake AW's being sold out there, so I'd like to know if there are other options aside from just AW?
 
A123Systems APR18650M1A.
it's 1100mAh 3.3V, but it's LiFePO4 so it's very safe. Just make sure to get a compatible charger.

That can be discussed, a battery that can deliver more than 60 ampere it not exactly safe. The Panasonic 2900/3100 might be just as safe.
 
I enjoy my panasonic NCR18650B cell's I just maintain correct voltage with recommended chargers and volt meters. It helps if you have a light with low voltage warning signal. These are the 3400mah panasonics and can be had for about 16$ My charger is 600ma and the cells do not even get warm and are fully charged within 3-5 hrs depending on level of discharge.
 
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