So about a week ago I replaced all my spark plugs and coil packs after a cylinder 3 misfire. After taking apart the air intake, and intake manifold to replace all of the plugs and eventually reassemble it all. The process took me a few days, all said and done went to fire it up and the battery was dead. So I charged the battery and it started up and ran great. About a week later the battery dies again. So I have the battery tested, it’s good. Charge again and test it with voltmeter, I get 12 with the car off and around 14.4 with the car on. Then the car doesn’t even make it two days before the battery is dead again. For reference, last year I replaced the alternator and the battery is labeled 2017.