The best next step you could take would be to get a current tester. Attach it between one of the cables and the battery and see if current is flowing through the cable. If it is, then you know the dealership didn't do their job and there is parasitic drain.At that point you need to look at electronics and wiring, a problem for a mechanic.
If you don't have a current tester, you can get a voltage tester and see what the voltage on the battery is doing. But I can almost guarantee its dropping though. The question is why.
If there isn't parasitic drain then it's a battery problem. Get a battery from someplace with a good return policy and put that in your car. If its fixed then you know the problem was the battery and take the bad one back to Sears.
If both of those don't lead to anything, put a sign on your car telling the aliens to stop stealing your batteries power.
Because your battery loses charge in cold weather. According to AAA, "Cold weather is tough on batteries. At zero degrees Fahrenheit, a car's battery loses about 60 percent of its strength.At a mild 32 degrees Fahrenheit, a battery is 35 percent weaker.
Keeping battery terminals clean helps, but a load test performed by a qualified automotive technician will help determine whether a car's battery is strong enough for winter starts. " A battery works through the use of chemical reactions that produce electrons. When it is cold, these reactions slow down producing fewer electrons.
Oil also gets thicker and gasoline evaporates less in cold weather. All three of things things affect how your car starts.(2) If you want to ensure you car starts, you need to keep your battery warm. There are three main types of engine heaters: the oil heater, the block heater, and the circulator.
All of these are available at auto parts stores.(3).
It may be low on fluid so that it's not retaining a charge for long. There could also be a short somewhere in the system that's intermittant. Because it's fine once you jump it, it isn't the alternator (or not likely), because your car would die mid-drive if it weren't charging the battery.
And it's probably not the belt for the same reason. I've had cars do the same thing, and it's usually just the battery itself that needs replacing. Always seems to be in cold weather, too.
Or at least uncomfortable weather so that when I've been stranded it's not pleasant.
I don't know, but it happens with some older cars. One of these might help... costco.com/Browse/Product.aspx?Prodid=11298862&whse=bc&Ne=4000000&eCat=bc|3960|21273|21276&N=4001203&Mo=13&pos=0&No=12&Nr=P_CatalogName:BC&cat=21276&Ns=P_Price|1||P_SignDesc1&lang=en-US&Sp=C&ec=BC-EC10614-Cat21273&topnav= It's a solar 12V car charger.
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