Dead Battery Blues!

[BlackjackM]

I gave up and threw in the towel.

Its all too complicated.



AGM Braille battery.

Thought you were just going with the OEM battery?

[ATLE36M3]

i am having the same issue right now...

was out of town for 2 weeks, came back and coupe fired right up. couple of days later batter was totally dead, charged it and a few days later dead again. its is like a 4 year old interstate battery that came with the car.

i am thinking of getting the oem one, tischer is listing it as 96.00 which seems like a good price

[mpire]

Yeah, but Tisher has to charge you shipping.

And my local stealership didn't seem to be able to find one.

The new BMWs come with AGM batteries, so I guess they should be ok.

This one also has lots of reserve charge.

[walterfinn]

I just bought a 2001 Z3 2.5i, and the battery dies after a couple days. I noticed that when I put the car cover over it, it sounds like a relay/contactor cycles every few minutes, possibly associated with a proximity sensor. I have done some searches for things to do before covering the car, but have yet to find anything that would indicate something that would cause this.
I have not done the basics on identifying battery age, alternator output voltage, etc., because I suspect there is something associated with putting the car cover over the vehicle.
Any ideas?