Depends on A) how you use them and B) what pv style you use.
Manual
batteries are sealed, so they are perfect for 'drippers' such as me who like to drip a bit at a time for cleaner flavour.
Automatic batteries are perfect for those who use pen style or mini pv's, you just inhale and it activates. I've yet to see one of these with a 'decent' battery life but many people do like these style.
So it's up to you depending on what pv you have/want and how you want to use it
