I've been scratching my head over this for months and I think I might have finally figured out why I'm replacing my battery every year while my coworker who has the same car gets nearly two years from his. The only real difference I can see is our driving habits. He lives in the suburbs and drives about thirty five minutes each way to work. I live near the office and my drive is barely ten minutes. Sometimes less if I hit green lights. My car never really gets a chance to warm up properly and I'm already turning it off again. I started reading about this because I was convinced my car had some electrical problem draining the battery overnight. But everything checked out fine at the garage. Then the mechanic asked me how far I drive every day and when I told him, he just nodded like he already knew the answer. That's when I learned about the impact of short drives on battery. Basically every time you start the engine, you use a big burst of power from the battery. Then the alternator needs time to put that power back. If you only drive for ten minutes, especially with the AC on full, the alternator barely has time to replace what the starter used. Do this twice a day for months and the battery slowly runs down lower and lower until it can't start the car anymore. That makes so much sense now. My question is, what can I actually do about this without moving houses or changing jobs? Would taking the long way home once or twice a week help? Maybe a thirty minute drive every Friday to let everything charge up properly? I don't mind changing my routine a little if it means my battery lasts more than twelve months. Has anyone here fixed this problem without changing jobs or buying expensive equipment? Would love some practical advice.