325i battery draining

[andy523]

the battery in my 325i keeps dying about every few days, i have checked everything i can thick of. i dont want to keep charging the battery either.
as far as i know the alternator is charging as the when the battery is fully charged it shows 12volts and my incar gauge and when car is running it shows just over 13 volts

[Grrrmachine]

To expand on will's great advice, have a read of this article:

http://www.e30zone.net/e30zonewiki/index.php/Battery

If you've drained the battery multiple times, there's a chance it's properly dead now and will need replacing.

[Brianmoooore]

An alternative and less technical first approach to what willnz suggests, is to ensure the battery is charged, then disconnect the battery negative lead from the battery for several days.
If the battery charge has reduced significantly when you reconnect the battery and try to start the car, then the battery is duff.

[andy523]

i will try all of the above, also i have 2 new batteries
thanks

[martijn76]

Is your radio connected directly to the battery?
My Alpine was and because off that was draining it, while 'off'..