Battery drain issue

[my07ty]

So basically what you're saying is it needs to be started, and ran for a small period of time every single day?

I bought a new battery, back in November. No issues up until about 3 weeks ago when it was -15° for a few days, and it was dead after sitting for 2 days. Charged it, and was fine for 2 weeks. Let it sit over a weekend same result. Pulled the battery and had it tested last Monday. It was determined to be bad. Got a new battery on Tuesday. Was fine all week. Parked car on Friday night after work, went to start this morning, completely dead.
I don't see how a brand new week old battery goes completely flat over 2 days with nothing turned on.
Getting more, and more frustrated with this car.

[CTScott]

Originally Posted by my07ty

So basically what you're saying is it needs to be started, and ran for a small period of time every single day?

I bought a new battery, back in November. No issues up until about 3 weeks ago when it was -15° for a few days, and it was dead after sitting for 2 days. Charged it, and was fine for 2 weeks. Let it sit over a weekend same result. Pulled the battery and had it tested last Monday. It was determined to be bad. Got a new battery on Tuesday. Was fine all week. Parked car on Friday night after work, went to start this morning, completely dead.
I don't see how a brand new week old battery goes completely flat over 2 days with nothing turned on.
Getting more, and more frustrated with this car.

That is not normal. The battery should last over 3 weeks of not being started. If yours is draining within a day or two you likely have either something that is drawing current when the car is off (bad stereo system install, etc.) or a bad alternator, which does not fully charge the battery when the car is running.