Battery going flat overnight

[banny]

I have an A4 Avant TDi 02 model and the last two nights the battery has been going flat, when I go to start in the morning there is nothing, put the 50 amp starter on it and it is fine.
I think the alternator is alright as it seems to be charging fine, as I can go a few miles and the car starts fine. so the battery must be holding charge.
Does anyone have any ideas.
Thanks for any help given

 

[terrysingh]

hello mate
have you recently done anything to the car, ie: nav install etc??

mine kept going flat due to a couple of things, firstly was the retro nav install, i accidently connected the tmc unit to the live, and the second was my engine cooling fan that had a faulty module, making it come on full speed and causeing a major drain...

unless you've still got the original battery as i did, audi recommend you change these every 5-6 years

i've got a big bosch one now, does the business!!!!

 

[inigoj]

Can you hear anything running after 5 mins, when you turn off the ignition?

If it is not a short, the normal cause is a pump or motor running on.

 

[banny]

turns out to be a knackered battey, theres a nice £110 down the drain.

 

[terrysingh]

£110 quid... my bosch only cost £60 from ecp??

 

[banny]

Oh well, you was lucky, I did look around and most places where around £80-£100 but never had in stock, Audi-Basingstoke had them in stock so I took it, as it was I really needed it now as it was a pain having to put my jump starter on in the mornings and having to wait for 10 mins to put enough in to start.
I am not worried anyway, job is done now and my car works good enough.
Knew I could get it cheaper if I waited but I am impatient, want everything yesterday.

 

[Caesium]

Blimey thats dedication to originallity, bought it from Audi, screw that! You must have cash to burn!

 

[J7USS]

I pictured a ****** off Banny when I read that!!!!

Oh well, you was lucky, I did look around and most places where around £80-£100 but never had in stock, Audi-Basingstoke had them in stock so I took it, as it was I really needed it now as it was a pain having to put my jump starter on in the mornings and having to wait for 10 mins to put enough in to start.
I am not worried anyway, job is done now and my car works good enough.
Knew I could get it cheaper if I waited but I am impatient, want everything yesterday.

 

[banny]

Blimey thats dedication to originallity, bought it from Audi, screw that! You must have cash to burn!

It was not really that, was a case of could not get one on the day as everywhere i tried had to order it in.
Dunno about money to burn though, not poor but certainly not rich by any standards.
Still its done now I suppose at least it will be on the audi computer system that the car has had a new battery from them.
Could be handy when I come to trade in for a B7