I've still got the originals from the 30+ charges test that are just now starting to get a little screwy after 2+ months.. I'd have to guess that some have 100+ charges now. I see the dropoff rate being about the same as any auto type battery because of
e-liquid getting in there or the switch getting grumpy. They all still work but some don't like certain atomizers anymore or have a harder draw..
I've got some 510 manual batts that have only lived half as long