What is the proper battery for my 2003 Volvo S80 T6? I'm trying to keep to the less expensive side. By brand would be great but as long as I know the requirements or specifications I should be ok to figure it out. Thank you in advace.

H8 battery.Walmart has the cheapest price with the same warranty as most places.most of the parts places or anywhere including the dealership batteries are made by the same company(Johnson Controls)they just stamp or label it to whichever company is buying them,except for NAPA.there batteries are made by East Penn / Deka. H8=Cranking Amps (CA):1000>>BCI Cold Cranking Amps (CCA): 900=3 year free replacement,prorated for 2 years,$123.13 plus tax plus your old battery.if bought at Walmart,they will charge you to install it.battery weighs 52 lbs.,located in the trunk.if doing this yourself,could take 30 minutes or longer for 1st timers,and DO NOT HOOK IT UP BACKWARDS!