Just wondering if anyone has had any experience with a Ballistic Lithium battery for a softail heritage which is a 12V EVO2 with 410 cranking amps.

Sixgun

 

I just put one in my deuce, much smaller, gives you a lot of room under the seat to work with. So far it's started every time, but it definitely doesn't seem to be as strong as the stock battery as far as cranking power. I know some people have used the next one up, the 16 cell, but the price tag goes up dramatically as well.