DSLRs always lap mirrorless cameras for battery life. There's practically no battery drain when its on until you actually shoot the shot since you are taking in

DSLRs always lap mirrorless cameras for battery life. There's practically no battery drain when its on until you actually shoot the shot since you are taking in light with a passive prism to compose your shot, versus the sensor having to be on and a display somewhere being powered with the mirrorless camera. Sony A7 shoots like 400 shots per charge. 5d mk4 lasts for twice as many shots otoh.