Well specs state 1200mAh capacity and cells are marked 600mAh so it’s parallel.

Btw I definitely am not arguing against your point that non-standard [cylindrical] batteries suck but LiPO’s like that arnt hard to source at all should they fail and Nitecore warranty not cover you (unlikely if it’s not user caused). That’s probably a <$5 pack from a trustworthy vendor like RMRC or other small business US owned RC hobby shops.