So a mate has offered me one of these monster batteries if i want it for my hilux. http://discoverbattery.com/en/product-search/view/EV185A-A Its a dry cell/AGM deep cycle/multi purpose from what i can tell. 1370CCA and 490RC so huge capacity, should run a fridge for days. The only catch is the weight, at 63kg it's a heavy bastard. Definitely more weight than i want to be lugging around for a battery but it gives me more capacity than ill ever need. 63kg + 20kg for a cranking battery would be too much for me though. If i run this battery it would be in a single setup. My fridge has a low battery cutoff at 11.8v, and i could set my LED lighing and any other accessories up the same. So basically the accessories wouldnt be able to flatten it past the point of not starting or damaging the battery. Obviously this isnt as foolproof as an isolated dual battery setup but im wondering if it has has enough capacity to get away with it. My car is a manual so i can always push start if i have to although id like to avoid that if possible!! Luckily being a dry cell i can mount it flat, either in or ideally under the tub to keep the weight low. What do you guys think?