Positive terminal on front left, Capacity: 77Ah, cold Cranking power: 780CCA, Length: 278mm, Width: 175mm, Height: 190mm, Weight: 19kg, Warranty: 5 years. Best price: £75 ($99) on ebay UK.
Won't fit in the standard KJ battery tray (a bit too long) so you have to modify the tray, which is very easy to do, before it will fit. (Just snap off the trays plastic lip on the side nearest the engine with a pair of mole grips (lock and twist and it snaps right off in pieces).
s-l400 by Alf Beharie, on Flickr