Keep their charge well
I bought 8 of these to replace all my well used batteries. I use a smok morph with cleito pro 120 tank and 0.6 coils. This device uses 2 batteries and i get between 240-260 "puffs" on a single charge. They seem to take a long time to charge but the capacity is large, I charge 4 at a time at 0.5 amp. These have to be the best 18650 vape batteries out there.
I found this product to be very high quality, my own nic-pick is the the font is a bit small on the battery. But you can still see it.
These batteries are probably the best I’ve had, they last me a day which is better then the others I’ve had