I was looking to get a battery at auto zone becuase they have a great deal on a AGM battery. (40 bucks off with promo TRT41)
I have a 2011 dyna superglide and they are saying that they do not sell a direct replacement but they sell the ETX20L...isn't that a direct replacement?

 

I'm not a battery guru, but I replaced my HD battery on my last bike with a knockoff hd copy battery off some website for close to 1/2 what an HD battery woulda cost me. Had it for about 2 years, with very little riding time, never had an issue. Also ordered a battery tender at the same time. In my experience with cheaper batteries, as long as you keep them on a tender when not being used, it will be fine. I also have no problem using cheap walmart batteries in my cars/trucks.

I'd say as long as the battery has similar specs to an OEM battery, CCA's, etc, you should be fine.

 

That sounds like the right part #. You can do a search on here. It didn't list my bike either on their site, but it fit perfectly in the battery holder and have not had an issue since (has been maybe 6 months).

Edit: This is what I bought: MagnaPower12-Volt Sealed AGM Premium Powersport Battery, 310 CCA
Part No ETX20L

It cost me $67.32 at the time. Bought January 7th, so almost 6 months to the day.

 

Thats what I thought...I don't think they've changed anything form your 2009 to my 2011 so it should work.

I feel better it didn't list your bike either. Too good of deal to pass up.