Battery dead from months idle

[93catt]

Running jumpers from our other car, I can turn the fob, hear various mechanisms like door locks and the dashboard lights up. Car won’t start. Thoughts?

[93catt]

And, does anyone please know the socket size to remove the clamp holding the battery in place? Clamp is inside the battery surround, towards the front of the car. Thank you!

[Dave T]

13 mm (based on my notes that I've made for the car). You need an extension because it's really deep down there.

10 mm for the battery cables.