Bigger Battery for Mondeo

Sandgroper

Hi!

After a couple of months sitting on the drive my 2009 Mondeo wouldn't unlock without the emergency key. The battery was too weak to operate the system , though it started the cat OK. This is probably the original
battery so a new one will be on its way, but Ford always had a reputation of using the smallest battery possible!

Has anyone fitted a larger unit? I will get around to mmeasuring the available space but just thought I'd ask!