Constant beeping after fitting new battery.

[tonikeys]

A friend of mine has a 1995 Bentley Brooklands. It's been sat for months and the battery went completely flat. He's just put a brand new one in and everything seems fine, although there is a loud constant high-pitch beeping coming from the boot area (I think).

Any ideas what this could be?

Car starts fine, everything else seems fine, just this loud beep.

[tonikeys]

Thanks for the quick reply. I'll ask him to give it a try.