Anyone have a spare car battery they want to shift?

[Glade]

I am going camping for the Motogp, and we have a cooler that runs of 12v.

I'd like to leave it running during the day from a 12v battery... When I moved house I got rid of a couple of old batteries I had hanging about which is a shame.

I can't be arsed buying a new battery just for one weekend, So if anyone has an old battery lurking in the garage they want to shift for £10, I'd really appreciate it.

I have a 20w 1A solar panel & regulator which is designed to charge a 12v battery and kept my motorbike conditioned nicely, so hopefully that will contribute 20w during the day something to keep the thing going too.
Hence a st battery with at least some capacity will probably get us through.