Anyway just dropped by here to contribute some advice and personal experiences that will hopefully help new users.
The first PV i bought and owned was the SmokerHaven e-cig with PCC from Johor. Very pricy and very full of sh-it The sales girl claimed that one cartomizer will last you 200 puffs till there is no smoke i.e. roughly equivalent to one pack of analogs. This is of course, 100% bull..... What i experienced was that the first 50 draws or so there was very little vapour produced with the taste being decent-ish. Subesquently the vapour improves substantially but you get a 'burning filter' taste which i now realize is the taste of the filler burning inside the cartomizer, meaning that it is time for a cartomizer change (as they are not refillable)
The overall vaping experience with these was extremely poor and unsatisfying. It ended up only being used when places where smoking is not allowed i.e. in the office toilet
Was about to give up the whole idea of quitting smoking and switching to vaping instead when i came across this forum.
After doing quite alot of research, i purchased a Janty JETS XL set which was satisfying enough to help me quit smoking analogs completely. I occasionally still take a puff or two from my friend's to remind myself how bad analogs taste though
About battery capacity:
I do not believe in measurement in hours as the amount of liquid vaped per hour can vary drastically from person to person. My Janty Ego XL batt (900mah i think) can manage roughly 3-4 ml of liquid on a LR JETS atty before needing to be recharged. This is sufficient to last me close to 2 days of vaping. If i am not mistaken, most vapers consume about 1.5-3 ml of liquid a day so a XL battery is almost guaranteed to last most people the whole day.