From what I understand, Vegeta, Freeza, and all of his men only use "Battle Power" when talking about power. I know Vegeta started using Ki/Chi the more he was on Earth, but that wasn't a thing early. Does Freeza ever use the term Ki/Chi when talking about anything on Namek? I always assumed Ki/Chi was an Earth thing, while Battle Power was just the wording used for those who relied on scouters.