The Arizer solo would be pretty easy to mod if you have even minimal electronic skills all it would take is finess and two or three soldered connections, some silicone glue or whatever it is, you could easily mod an 18650 battery sled into it so you could just charge your own batteries and swap them in and out. Basically like the Arizer air it's just a smaller solo with a single removable 18650 battery, but you'd have two batteries. Buy like 6 of those Panasonic batteries the 3400mAh ones basically have like a solid day of vaping nonstop without charging anything. If you charge pairs between swaps it'd be 24/7 unlimited vaping lol. Holy shit im stoned who am i typing to it took me like 10 mins to tap this