Optima

 
Can you see it?
Yes...that little red thingy in the left hand corner...my battery was starting to fail...so I bought myself an Optima.
Since my Jeep is a Diesel, I used to have a 74Ah unit installed whilst this Optima is only 50Ah...but to tell you the truth it works great. With the capability of 1100 Amps at 0 deg. the glow plugs heat up in no time - almost twice as fas as with the previous battery. Now I'm thinking of getting a second battery like this, but the yellow top version, for the foreseen winch. It will go in the place of the air filter box, when this is replaced by a tubular unit, to facilitate installation of a snorkel. ;)