So I guess it's time to post this problem....

[SLC_S4]

My battery is continuously dying.....so what do you guys think it is?
The battery is an Audi battery that I bought brand new a little over a year ago. The voltage never drops below 12 while I'm driving the car, but it always seems that if I don't drive the car for a day, it won't start the next day. If I jump the battery, I usually have the same problem the next time I go to start the car. If I charge the battery over night, I won't have any problems for awhile. Alternator bad maybe? Is there anyway to test that?

[Rajan147]

alternator, not charging the battery, but it seems like your getting a full day out of it which is strange, once they take a shit, their donezo.

once you have it out, autozone or advanced auto can test that part for free.

Maybe a weak battery? Seems like everything is slipping past audi quality control these days.

[SLC_S4]

alternator, not charging the battery, but it seems like your getting a full day out of it which is strange, once they take a shit, their donezo.

once you have it out, autozone or advanced auto can test that part for free.

Maybe a weak battery? Seems like everything is slipping past audi quality control these days.

Yeah, it's weird. If it's the battery, Audi will charge me only 30% of a new one. Maybe it'd be worth it to buy it and see if that solves the problem. Could there be something draining the battery? That's another thought I've had.

[PaCmAn...]

Yeah, it's weird. If it's the battery, Audi will charge me only 30% of a new one. Maybe it'd be worth it to buy it and see if that solves the problem. Could there be something draining the battery? That's another thought I've had.

i have this issue right now myself brother, it a battery issue or ground...the ground might be loose, my problem was the battery has died too many times so its time for a new one...like dude said on top the battery dies completely, then you need a new one...also whats up with the trunk dude...lol i sent you another email...thanks

[SLC_S4]

i have this issue right now myself brother, it a battery issue or ground...the ground might be loose, my problem was the battery has died too many times so its time for a new one...like dude said on top the battery dies completely, then you need a new one...also whats up with the trunk dude...lol i sent you another email...thanks

I haven't gotten another email from you since I sent you the shipping quote. Try sending it again.

[Audimarc]

Energizer. The bunny will make thing right.

[kodycobra]

My battery is continuously dying.....so what do you guys think it is?
The battery is an Audi battery that I bought brand new a little over a year ago. The voltage never drops below 12 while I'm driving the car, but it always seems that if I don't drive the car for a day, it won't start the next day. If I jump the battery, I usually have the same problem the next time I go to start the car. If I charge the battery over night, I won't have any problems for awhile. Alternator bad maybe? Is there anyway to test that?

Since you were kind enough to help me out... Time to return the favor.

I had this exact same problem on my Cobra a while back. If it is indeed the same problem, it's called parasitic battery drain. I went through 4 batteries in a freakin year!
A parasitic drain is when an electrical device is using battery power when the car is turned off, and the ignition key removed. It's just like leaving your headlights on overnight. I noticed with my Audi that you can operate the radio with the ignition key removed, and that my Valentine1 stayed on as well. I unplug it now everytime I shut off the car.

Just think to yourself... Do you have any electrical devices that are hooked up to a constant wire, such as... radar detector, boost gauge that stays on with no key in the car etc.?

Here's how to test for Parasitic drain on your battery...
Tools you'll need:digital multimeter or ammeter, fuse puller, owners manual(for which fuse controls what) and an 8mm(or 10mm, can't remember) socket to take off the battery terminal

Here's a test procedure..
1.Remove the negative side battery cable from the negative battery terminal

2.Attach an digital multi-meter(on amperage) between the negative cable and the negative battery post. wait a few seconds to several minutes for the car to go into sleep mode. i.e. when you make the contact with the test light the cars computer systems "wake up" after a bit of time they will go to "sleep".

3.If the multi-meter is reading over 25-50 milliamps, something is using too much battery power.

4.Go to the fuse panel(s) and remove fuses, one at a time. Pull the main fuses (higher amp ratings)last.

5.Watch for the multi-meter to drop to acceptable drain. The fuse that reduces the drain is the draw. Consult the owners' manual or service manual to find what circuits are on that fuse.

6.Check each device (circuit) on that fuse. Stop each lamp, heater, etc. to find the drain

7.Repeat steps 1&2 to test your repair. The digital multi-meter will tell you exact numbers

*I didn't write that test, I stole it from google because I'm too lazy to type it all

That's just my guess, because I've experienced the same problem. It could be a loose ground I guess too, but... doubtful.

*I didn't mean to insult your mechanical appitude by posting the procedure, that was a just in case you didn't know kinda thing.

[SLC_S4]

Since you were kind enough to help me out... Time to return the favor.

I had this exact same problem on my Cobra a while back. If it is indeed the same problem, it's called parasitic battery drain. I went through 4 batteries in a freakin year!
A parasitic drain is when an electrical device is using battery power when the car is turned off, and the ignition key removed. It's just like leaving your headlights on overnight. I noticed with my Audi that you can operate the radio with the ignition key removed, and that my Valentine1 stayed on as well. I unplug it now everytime I shut off the car.

Just think to yourself... Do you have any electrical devices that are hooked up to a constant wire, such as... radar detector, boost gauge that stays on with no key in the car etc.?

Here's how to test for Parasitic drain on your battery...
Tools you'll need:digital multimeter or ammeter, fuse puller, owners manual(for which fuse controls what) and an 8mm(or 10mm, can't remember) socket to take off the battery terminal

Here's a test procedure..
1.Remove the negative side battery cable from the negative battery terminal

2.Attach an digital multi-meter(on amperage) between the negative cable and the negative battery post. wait a few seconds to several minutes for the car to go into sleep mode. i.e. when you make the contact with the test light the cars computer systems "wake up" after a bit of time they will go to "sleep".

3.If the multi-meter is reading over 25-50 milliamps, something is using too much battery power.

4.Go to the fuse panel(s) and remove fuses, one at a time. Pull the main fuses (higher amp ratings)last.

5.Watch for the multi-meter to drop to acceptable drain. The fuse that reduces the drain is the draw. Consult the owners' manual or service manual to find what circuits are on that fuse.

6.Check each device (circuit) on that fuse. Stop each lamp, heater, etc. to find the drain

7.Repeat steps 1&2 to test your repair. The digital multi-meter will tell you exact numbers

*I didn't write that test, I stole it from google because I'm too lazy to type it all

That's just my guess, because I've experienced the same problem. It could be a loose ground I guess too, but... doubtful.

*I didn't mean to insult your mechanical appitude by posting the procedure, that was a just in case you didn't know kinda thing.

That may very well solve my problem. I'll definitely be checking into that. I appreciate the detailed info.

[kodycobra]

I just hope it helps you man! I was scratching my head wondering why mine wouldn't start.

[B501S4]

well if its the alternator i just went through that and they should be able to check at advanced auto or autozone to see if the alternator is fine without pulling it out first. good luck

[FrimmelNoJerz]

its a new battery....but is it a new alternator or voltage regulator? also, do you have an aftermarket afterrun system?

[SLC_S4]

its a new battery....but is it a new alternator or voltage regulator? also, do you have an aftermarket afterrun system?

Well, I don't have an aftermarket afterrun system, but I do have the lower temperature thermo switch

[FrimmelNoJerz]

does it stay on for a long time after the car is shut off? that killed my batteries(3) because it was installed improperly.

[SLC_S4]

No, it doesn't seem to stay on for a long time. It would make sense that could drain the battery, but I really don't think that's what it is.

[gointoscott]

One thing I always do to see if the alternator is working correctlywhen I have problems with the battery dieing is: while the car is running unhook the battery and if the car dies then you know the alternator isnt charging right.

But from all the posts I would agree it sounds like you have a small drain and or short on the battery that is killing it overnight.