Was in Stoopid Cheap this morning, and looked at batteries on a whim (the GTR has been getting very slow to crank, I stalled it yesterday after 30 mins running and it wouldn't crank over). Anyway, looked in teh catalogue, found the part number I needed, they didnt have it. Spied a few Century sealed batteries looking lonely on the shelf. Cold cranking amps and amp hours were teh same as the stock battery. Found a shop assistant and asked if they had a catalogue for the Century sealed batteries, and was rewarded with the minimum wage I don't give a fcuk look and attitude :roll: , so went and got one of their tape measures out of stock, and compared it to the book measurements for the stock replacement battery. Was only a few mm taller than stock and a little narrower, so thought I'd give it a go. Anyway, I am now teh proud owner of a sealed battery that cranks the GTR over like a top, and it cost just on $80! No more 25 minute ritual every 3 months checking acid levels!!! And yes, the stock lead acid battery would have slightly exxposed plates after 3 months. Only issue with these batteries is teh terminals are vertical steel plates sticking up out of teh battery case, so if your battery is a very tight fit or your battery cables are very tight and can't be stretched and bent a bit, it may not work for you! Regards, Andrew.