My fave go to is Mini 18490 but I usually have some kind of bag, car purse, backpack, outdoors or travel vest so I can carry extra juice and battery or batteries depending on how long I'm gone. I just did almost 2 days on an 18490 and it was getting iffy. When I took it out my dohicky didn't register any voltage. But, even if I ruined the old AW it, at the very least gave me some vape last few hours.
BTW..... half of my batteries have some age on them. I, most usually, assume they are going to crap out on me too soon; hence carrying backup batteries. AND I frigg'n hate getting stuck, without batteries within a few miles, so most usually keep spares packed and ready. Main issue is remembering to top off packed spares every week or so.
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