I have a V70 CD TDI first registered 1997. After being parked up for two days the battery is drained. I have had it checked out at a vehicle electrical specialist and they could not find the cause. Any ideas?

 

how old is the battery? If its more than 4 years, time to replace. the "electrical specialist" should have measured the current draw with the key off to ensure the current used to power computer memory/radio presets etc is within spec. I'm not sure of the exact spec but I'd suspect it would be in the 10-20mA range (which would take weeks to drain a healthy battery). You can probably rent or borrow a loop meter to see what it measures. After that, its a matter of identifying what paths are drawing current with the key off. If that looks normal, then you'd test with the key on and the engine running to see if the alternator can maintain ~14V (An 80% charged battery will measure ~2.6V - a 20% charged battery is around 12.2 or 12.3V...)

A few things to check out - vanity lights (glove box etc) staying on (common issue), alternator issues, alarm battery, cabling to battery come to mind.

 

Thanks for your reply. The battery is good. I would have thought that the specialist would have checked out what you suggest. Anyway have got a new MOT so the car is good otherwise but am going to sell it. Shame as it runs so well.