X5Dave

I removed the battery completely to charge it. Its the correct one for the car yes however I've not told the car it has a new battery? 

So I changed the battery connected it all back up and put a multi meter on the battery and sat and monitored it it was showing 12.90v and after 10 mins the car went to sleep the multi meter started showing 13.10v when the car had gone to sleep. 

I kept monitoring it for 50mins and the multi meter stayed on 13.10v

We had to go shopping we returned after 3hours u connected the multi meter and the battery was on 2.6v something has happened in that space of time and drained the battery

No not got a scanner I've checked lights are off ect I've now worked out that it's not even lasting 7hours so it's quite a hefty drain on the battery 

So I have a 2010 X5 and the battery is going flat overnight. There's a serious drain someone to the point you can't even open the doors it's completely dead. At first I thought it was the battery so I bought a new battery which I've returned and had tested to check it wasn't a faulty. Is there a common fault what drains the batteries on these cars before I chuck endless amounts of money at an auto electrician?