I have a 2016 Corolla S. I bought it in May of 2019 for my daughter. In October the alarm started going off and the engine would drag trying to start. I replaced the battery with a higher cranking Amp and it worked for 3 weeks. The car is now having the same problem. I'm putting a battery charger on it every night so my daughters' car will start. Are there issues with the factory alarm system that causes the battery to drain over night? I don't want to keep spending $180 dollars every month or keep using a battery charger. The car will run with everything on with no alarm sounding when I disconnected the negative terminal from the battery after it was started. I did this to test the alternator. Would this eliminate a bad alternator?