Reviving this old thread. So what is the consensus on the battery type to be used on an eVic?
I've got a short tube coming my way. Some say either button or flat top 18350s would work. Being a noob on the subject, should I go with protected or not? Is IMR a good choice?
"IMR" is the chemistry of the battery, in short, it's a type of Lithium Ion battery, but the chemistry has Manganese (Mn) in it.
I'm gonna guess your question is on the brand of battery to use. I'm using an IMR type of unprotected battery in my shorty. The brand I'm using is AW. The AW brand has the lowest mAH spec, but after sifting through many discussion on this topic, is because AW is more conservative with their numbers, and they usually get the first cut from the contract manufacturer who actually produces these sales. I believe Efest gets the second cut (first cut being the cream of the crop), and so on...
Don't be fooled by the capacity numbers, there is only so much charge that can be stored inside this little 18350 form factor for batteries.
My suggestion, get the AW 18350 battery. My opinion, and my opinion only, you don't need protected batteries... eVic would not be pulling anywhere near the discharge limitation of these cells.
As for button top and flat top, whatever you can get your hands on. They both work. The spring mechanism on the end cap is forgiving enough that it can operate with both. I'm using the AW 18350 700mAH IMR, unprotected, button top in my shorty and it works just fine.
I think I'm going to get another AW 18350 cell soon, since going from 2600mAH Samsung (default one that came with it) to the 700mAH, the 700mAH lasts only about 1/4 of my day of vaping!
Also, switching between two batteries, you have pseudo-extended the life of the battery by 2 folds (ok, the MTBF is still the same, but from user-experience of before failure)....