And the morale of the story is this, if you can't get by with charging batteries at trickle charge speed, ie by the time you have discharged a second battery yet the battery in the charger is only 50% charged still and this leaves you no batteries to vape with, "You need more batteries". Working in a vapor shop I see this all the time, especially with mech sub-ohm vapers, to cheap to buy enough batteries to last them an outing or day yet have plenty to spend on 6 bottles of juice, and complaining they always need to wait for their batteries to charge to vape. I have various batteries for my various devices, 18490/18500s for my Provari Minis, to 2 Panasonic NCR18650B's for my SVD's and Provari P3, to 8 HB4 and HB6s for my mechs, 3pairs of VTC4s for my IPV3, Sig150, and Kbox200, 6 25R rev5's for when needing a little oomph in my single battery mods, 4 button top 25R rev3's for my Reo Grand, and about a dozen HG2's (half charged and in use, half still new in their boxes). Not only do I rotate through devices throughout the day, I rotate batteries to be used through out the day, comes out the mod gets set aside at least an hour, put on charger, once charged gets set aside to rest then put in the back of the line of batteries for use later, could be 3 days to a week before they get use. Single battery regulated you need 2 batteries for proper rotation, single battery mech you need 4 to 6 batteries for proper rotation, double battery regulated you need 4 batteries, dual battery mech you need at least 8, triple battery regulated you need 6 batteries, that is about bare minimum numbers you need to prevent over wear an tear as well as not having to rapid charge batteries all the time, customers call BS on me at first but later wisen up once they get experience later down the road.