Quick question regarding battery replacement. I have a 2009 Road King. My service manual states 19amp hrs and 270 cca. I found a battery Model ETX30L which states 26 amp hrs and 400 cca. My question is will this bigger number battery hurt any? Should I just go with the OEM battery through Harley? From my understanding the ETX30L is a direct replacement but why the higher numbers? Thanks for your help in advance. BTW the battery in the bike is still original and its getting hard to start so im assuming the battery is starting to go out and just want to replace it before I get stuck in the middle of nowhere.