Battery indicator lit up a while ago and went away. Few days later my Lexus gs 06 died at a parking lot. Bought a new battery and replaced it and everything was running good for a day until it died out on me again.

Figured it might be my alternator shitting on me so I tested both battery and alternator with a voltmeter for measure.

Battery:
Volts - 12.45v
Measured: 820 CCA
Rating: 700 CCA

Cranking: 10.99V
Time: 0.75S

No load: 13.90V
Loaded: 13.88V
-

Test looks fine and car starts without stuttering fine for the past week but the battery light would randomly pop up on the dash from driving to point A to point B, then it would turn off from going to point B to point A. < on repeat

Had hondas and BMWs before but it’s my first time owning a lexus. Maybe the car needs a hard reset or my sensors are jacked up? Not trying to get stuck in a parking lot again.

Thanks in advance