For a typical day's outing I top my tank off and carry a spare battery (in its plastic storage case). I haven't smoked in many years and can now easily do without vaping for most the day (if need be) so I don't carry tools and such. For an overnight trip I take juice and several extra charged batteries (all in cases). For long extended trips/outings (a week or more) I pack heavy. Multiple batteries, charger, a spare Pico & atty, a variety of juice in glass dropper bottles and take my rebuilding kit just in case. The kit has wire, wick, O-rings, napkins, jeweler's screwdrivers and micro wire cutters inside, everything necessary to completely rebuild an atty multiple times. Sounds like a lot but it all fits in a small leather pouch.