I don't know what batteries you currently use, but the P42A Molicels are 4000mAh so they will be one of the longest lasting batteries suitable for most vaping applications. I think you'll be happy with them.
Also, since I can't compare to what batteries you've been using, realize these Molicels, Samsung, Sony etc batteries are OEM batteries, meaning they are not made for constant handling by consumers. As such they have thinner wraps on them than non-OEM brands. So keep an eye on the wraps, inspect them frequently, and realize that when you see any sign of wear you need to rewrap them. The wrap serves an extremely important safety function.
I read a post a few weeks ago on a non-vape forum where some guy knew a guy that took the wrap off an 18650 battery because he liked the way it looked better without the pink wrap on it

. This caused an "accident" he'll likely never forget.