Are all Sony batteries absolutelly awful?

I previously had a second hand Sony Nex 5 and i thought the battery was just old so i was fine with it not lasting that long, but recently i got a Sony a6400 and omg, the batteries are literally the same. The battery went from 100% to 60% just with me messing up with the setting and taking some photos when i got my hands on it, are they all like this?