what's the difference in, "M12 2.0 red lithium & new M12 2.5 high output red lithium" batteries!?

just a quick video on comparing the two batteries and seeing what's inside them, never tore into a Milwaukee battery before so this was a first for me, actually a easy battery to work on!
#toolhead #toolreview #diy #tool #diytools #powertools #milwaukeetools #carpenter