....so I've been running a single battery all this time for nothing? (out of a set of 4 I bought all at the same time, a while ago - same brand (VTC5), roughly same amount of cycles, same device uses)
Well call me a sucker, I bought into the whole 'married' batteries thing and took it as gospel. Shoot.
edited to add: So here's the rub. I have a dual battery device that'll run just fine on a single battery - been doing so for a while now, since I screwed the pooch on a specific "married" pair I bought and used exclusively in the device and shorted them out. So those are gone and the device has been replaced with a new one. I've got a ton of 18650's of many brands, and a lot of them bought in groups of 4 at a time - but I've never bought another specific Pair of batteries to Marry to one another since shorting the first pair out. Am I reading this right that they should be fine to run together? Like... like wild-oat sowing floozies?!