Sweedfish.
Not so with me, or many I know I've sold to on the cig sized batteries always needing charged.
I don't have to charge batteries all day with a cig sized unit.
I charge 3 at night and rarely use over 2 in a 808 format throuot the day. The 808's come in 220-320-420mah sizes. I have one 420mah unit (XL battery), and I never use it since it's too large for my taste, but when I have, the carto's go down way way way before the battery will.
So if ypou need to change off a carto anyways, and you have a fresh battery ready,,,what's the inconvenience?
. Mind you the 510's are not as long lasting, but the same holds pretty much true.