Here is the deal on these rechargeables though... You will get a longer, more consistent "vape time" between charges if you don't get in the habit of draining it to the point that it won't fire before you charge it. Buy a backup if you need to and put each of them on the charger once a day to get the best overall experience with them.
Here is my story to go along with it: My wife and I both quit smoking with the help of 1300mah Spinners, initially one a piece. Her first one started out lasting her a day and a half with her regular vaping habits. When I got her her backup spinner she continued to use one until the charge started going flat and would then swap them. Her first one now is only good for about 7-8 hours. I've got her in the habit of swapping them (on the charger) each day, in the morning and then again in the afternoon. They seem to be lasting much longer that way.
Another friend of mine, a recent vaper too, started with one 1300mah spinner as well. He refused to buy a backup (until quite recently). He was in the habit of running it out of charge, maybe throwing it on a charger for 30 minutes or so, vaping for a bit, etc. until he went to bed and finally gave it several hours of charge time. His original spinner will now only hold a full charge for about 2-4 hours of vaping!
Better to buy a backup and split the vaping work between multiple batteries. YMMV.