Just ordered a Deka battery today. An eBay seller offers for $95 including shipping. Bike shop told me the dealer cost is now $170 freaking dollars. That's up a LOT since the last time I needed one. Deka is the OE for the Harley branded batteries so gave it a shot.
Dealer MSRP is currently $170.95. Dealer cost is significantly less. I always thought it was a ripoff when Harley sold the batteries for $100, but this is getting ridiculous. I can wander over to any auto parts store and buy an AGM battery for a car or truck for much less than what Harley wants for the small one in their bikes. I remember looking at Odyssey a couple years back and thinking it was overpriced; now the Harley battery basically costs as much as the Odyssey. Since I'm pretty sure they don't have gold terminals or other fancy stuff, it's very hard to justify in my mind.
The Deka seems to be a good and definitely more reasonably priced option. Plenty of folks have indicated buying them online recently rather than pay Harley's price. There are some others out there advertised for a similar price, very possibly also made by Deka but sold under various brand names. One of the positive things about the internet is that it is much easier to search for and find better solutions these days. Harley obviously thinks they still have a captive clientele that has to come to them for everything. Hey Harley, wake up and join the 21st century!
Jerry