You don't really need 900 CCA, but a big battery is always a plus. I usually just go the shop and ask for the biggest one that fits (not only for the Rangies, but for all cars). I found the 110Ah ones as used in Defenders also fit, and perform excellent. Any battery (preferably from a known brand) over 75Ah will do, but try and find at least 95Ah.lesjonpool said: