I'm going to convert all my games to super caps when I get time as I'm a shocker for batteries my gorgar has the same batteries in it from when I got it ( how bars that). No leakage and they are the black and gold aswel.
But thanks nick for the reminder I'm going to rip the boards out and super cap it tonight.
Just a word of warning when using super caps and memory backup caps... these too can leak and cause corrosion!! Being a electronics tech by trade i have seen them leak (on one occasion) in electronic equipment and corrode boards (some Sony sound systems and some older VCRs used them). Admittedly it is rare but it CAN happen. My boss just confirmed this for me as well, he too has come across leaky corroding caps and has seen them corrode boards.
So i would be checking these caps from time to time if using them.