I'm now wondering if this is some sort of OCD perfectionism, really.
No, it may not have the EXACT SAME run time as the other battery.
There is this concept called "good enough." I am a perfectionist myself, and it's ONE reason why I get in my own way, don't complete things and etc.
There is this concept called "good enough."
THE GEAR YOU ARE USING NOW ALL OF IT, IS NOT ONLY GOOD ENOUGH but it's BETTER than a lot of vapers GET to use.
GET OUT OF YOUR OWN way and go VAPE. Go hold your wife's hand, whisper gentle things into her ear, take her to a deserted spot and make sweet gentle love to her (and yes, your performance will be "good enough!") *Provided you aren't thinking about your batteries the whole time."
It's either that, or enter therapy for a few years, while also adopting some sort of martial or precise form of mindfulness practice (I do both, and when I do both consistently I am less annoying to myself and others.)
Trust me on this, it's all good enough, including you. You don't have to do a dang thing more besides do whatever's needed to take your mind of the batteries.
You bought them, they're coming, and there's nothing you can do at this point. WHEN those batteries wear out oh say in 18 months or whatever, you can address the issue THEN.
Mah God.
Anna