I think the most suitable battery for LR Discovery 2 is Varta Promotive Black 106Ah-120Ah. I have managed to find on a local dealer. I might go to check if the dimensions would fit my car.

I've been modified my old Land Rover Discovery 2 to suit my need for off-road. I've made it 60mm wider with some wheel spacers. The suspension dampers and springs are all changed. The lifting kit made it 2" higher. In the front, an ARB bumper holds a heavy electric Superwinch.
I am thinking of changing the battery also, and replace the original one with a

I should check all the slashdot options around :)