yaris 2009 charging light problem

[ASEMX1]

greeting everyone ...,

i have problem on my yaris 2009 charging , from 3 month's the battery light flashed randomly and the headlight and horn starts to reduce lighting like the battery dies all that the engine running , and finally the car didnt start .
i checked the battery and its good and
checked the alternator regulator and its fine,
checked the alternator voltage its fine also
, changed the alternator the same problem
, checked the fuses all good

i changed the alternator with corolla 2007 alternator its fine but the battery lighted very low light

what i do ?????
sorry for my bad language