It’s because none of the major battery manufacturers make the 18350 size. The reason we get such high capacities and energy density from 18650 and 21700, but not from 26650, 26350, 18350, 18500, 16340, 14500, etc… is because Sony, LG, Panasonic/Sanyo and Samsung use their very refined, proprietary battery chemistries on just those 2 sizes.
All of the other “non mainstream” sizes are made by smaller battery companies who’s chemical mixes are not quite as good.
the shown prices include shipping to following countries:
Germany, USA, Spain,Italy,France,UK,Austria,Sweden,Belgium,Canada,Japan,Portugal,Netherlands,Hungary’’
What for other countries ?
I try to pay and it will charge me 39.95$ on PP, I don’t understand is shipping fee free worldwide or not ?