SED

While we are on the subject of compatibility with the 7800, has anyone had trouble with their 7800 High Score Cart. I have the 7800 without port that has the open space for the connector(86'?), and the 7800 with no port or open space (88'). I do not have an 84' version. On the 86' version the cart works great for about 2 to 3 weeks, and then I loose all my scores do to the batterygoing dead. I have the newer HSC cart as well. On the 88' version of the 7800, my scores eventually get all scrambled up. Not sure how long it would keep them though. The 88' version works with the Cuttle cart and Super charger just fine also, and those do not work with the 86' version at all. Just wondering if anyone has had there scores last on the cart for more than a month using a "newer system" besides the 84' version. I have tried leaving it in the system as well as pulling it out after every use, and it only holds the scores for about 2 weeks.