So new battery doesn't fix the flickering. Will have to get the alternator tested somewhere I guess.
In case I didn't mention it flickers no matter what at idle or rpm under say 1000. The lower the idle the more flicker though. With fans and headlights off. Voltage seems not so steady at idle as it rapidly bounces between 14.2 to 13.6 or so. I think the flicker is in time with these rapid fluctuations.
Just did an alt in my focus as well and its voltage is way more steady at idle.
Wish it is as fast as it sounds...