What's a mirror? :eyetwitch::wink-new::friendly_wink:
I'm unclear what it is the OP wants to do, exactly, but are we talking about using Mirror Lock-up Mode?
I'm no time lapse-expert but assuming it's even possible, which I doubt, using MLU like that would drain your battery faster than...As I understood the OP, it would be similar to Mirror Lock-up Mode by basically having the mirror left up between the individual time lapse images. I've used MUP for individual images, just not sure how it would behave on a programmed exposure like timelapse or exposure bracketing.