Spare batteries are more practical (and cheaper; 20-30$ for smallish piece of steel is a bit too much), as I'd rather have extra batteries in my pocket, than larger PV all the time. 18350 lasts long enough to not be an annoyance, and I like the fact that smaller batteries charge faster.
However, I did purchase 18490 extension "just-in-case". As it turned out, I use it at home just because button placement is kinda awkward with Mini, so overall longer body feels more comfortable in the hand. Longer battery life I get out of it isn't that important to me at all.
However, I did purchase 18490 extension "just-in-case". As it turned out, I use it at home just because button placement is kinda awkward with Mini, so overall longer body feels more comfortable in the hand. Longer battery life I get out of it isn't that important to me at all.