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This is the one I get, fits in the existing battery tray like stock. Never going back to an acid drip line, just dumb with current technology, good luck.
MotoBatt is my preferred brand these days. Factory HD is now my second choice. The MotoBatts are versatile and strong; they are made overseas (Phillipines at least) but not China.
When I first got my shovel it had bad wiring issues. I took my battery in to the dealership to have them test it (they do this for free, believe it or else) and the guy says, "What the hell did that thing come out of"? Turns out the battery was good. I was sort of hoping it was bad thinking a new one would end my troubles.
Anyway, next time I need a battery I should get one of those AGM ones. I think the last time I looked, I couldn't find one but that was quite a ways back.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.