Alternator/generator/regulator problems of the 2009 Hyundai Genesis

This car has electrical problems. I saw a low battery indicator light on my dashboard while driving. I replaced the battery with a new battery from auto parts store. That new battery died on one week. Had to tow my car to the mechanic. Diagnosed with a weak alternator. Not a dead alternator but a weak alternator. I was told this is common with the Genesis cars. The weak alternator caused electrical problems for the rest of the car causing weird electrical problems occasionally.