I have searched and read through a lot of threads about batteries, but cannot seem to find this information. I am having trouble with a new HD battery. When I'm home and the K9 is on the tender, all is good. But when I'm on the road and it's not on the tender every night, it drops off and won't turn the bike over. Talking to the local HD dealer, he wants to know... what is the manufacturer's cranking amp requirement? Does anyone know? Thanks in advance.