> With a DSLR battry life is measured in months (I go on vacations and don't even bother bringing a charger) since the camera doesn't need to consume any power most of the time.
That's more than a bit optimistic. With things like lenses with IS, etc., it's quite easy to use a battery a day with a DSLR. My 5D4 would run down the charge on two batteries on heavy use days (like weddings, to be sure) but a full day walking around SF would need a charger.