How heavy duty?
Decent battery Nicky Tbf expensive but worth the moneySplash out and buy a Midac battery. I’ve 1 thats now about 4 years old in my Range Rover, and it’s fantastic. The RR is the hardest vehicle I’ve ever had as far as needing good power to start it goes, and the Midac cranks it over like it’s a 2 stroke boat engine. It could sit for weeks and not lose a bit of cranking power. I also installed them in the lorry and the aul boys V12 Merc, all of which need big amps to get them going.
@Ged could comment on how good they are, as that’s what he used for his Cummins LR too.
Decent battery Nicky Tbf expensive but worth the money