45Ah "standard" car battery.
Like it says.
It was man enough for the boat when all it had to do was crank a Clamshell, in the "good old" days when the VHF was a handheld & the "plotter" was an Etrex.
Now have a 2Kw sounder, plotter, Fixed VHF etc etc and quite simply 45Ah ain't big enough.
It's seen 5years of use, and has been kept on a trickle charger when not used. Still doesn't alter the fact it's low capacity & not a leisure batt, but would be fine for cranking a small O/B. Hence free.
Free delivery can be arranged between Glasgow / Aberdeen next week and if you can wait 'till march Glasgow & Essex. (although I guess nobody is going to want to pay to get it sent!)
Donation of a couple of bottles of beer would be accepted, but not necessary!