Battery Totally Dead?!
 

Hi all
My '00 2.8 Sport's battery has just inexplicably and suddenly died. No prior indication of a fault (I've had the car for 2 years or so and all good), it just completely drained from one day (or maybe two or three days) to the next. I'm a complete layman, but I do have a multimeter(!) and it's registering 0.7v! I've taken the battery out and currently have it on an overnight trickle charge.
I do have trusted local Audi specialist I can take it to, but I just wondered before I do that, if there might be a simple reason that I can maybe fix myself why this might have happened? No, I didn't leave the lights on(!), or anything else that I can think of...
Any suggestions at all?
Thank you! :-)

It probably just needs replacing - they often fail in that way and if it’s showing less than 12v with no load on it then it’s probably toast. Find someone with a Halfords trade card (they hand them out like confetti) and a Yuassa with 5yr warranty is just over £100

Yes, just replace the battery.

My Volvo one went a month or so back, I sstarted it and drove the 17 miles to work. Returned to the car 7 hours later and it was completely dead. New battery installed and it's been fine since.

The best one was when the battery failed on my old Granada, I started it drove 3 miles and returned 10 mins later to a dead battery.

Had to replace mine recently for similar reasons, mine was gradually failing but probably more noticeable as I don't drive it frequently. The cold wet weather won't be helping.

As with Adrian I can also recommend the Yuasa (YBX5019 mine was). I purchased from Amazon for £120 including shipping.

Thanks very much for the advice everyone, much appreciated! I've bought a Yuasa YBX5019 as recommended :-)