It's going on 7 yrs with the OE battery in my EG Ultra Classic. The dealer replacement HD battery is, of course, a good $50 more that aftermarket. I've read some not so flattering reviews on the OE replacement but I suppose any can have a bad batch. Just trying to decide between Deka (makes HD's batteries) or Interstate as those I can find within a reasonable distance. Any thoughts or long term experience with either?