But you must also take into account that voting costs nothing, unlike buying a battery.
I've voted for that issue because I think it would be nice to have such possibility, but it doesn't mean I'd buy it right away (maybe in a year or so, if it's really necessary). I guess there are more people like me, so it doesn't reflect the real demand.

I also have 3-4 batteries for my N900 which I'd swap during the day, but Jolla lasts long enough, so I haven't had the need to buy a spare battery yet (the need might come later, but I'm sure it will be available by then).

For cycling and hiking, I have this external battery, but I use it ~1x a year. It's an option, though.

@Nieldk: Here's the cheating reference. By the way, I respect your choice and I am very thankful for all your work on Jolla. I just think people should really calm down and not always expect the worst...