Take the guess work out of when your battery will die or will no longer be useful, with the Battery Bug, by Argus. I have one installed on my Stallion and it works very well. Gives me that "peace of mind" of knowing the condition of my battery at all times. Here's a link: Argus BB-SBM12-PS Battery Bug Battery Monitor for Motorcycles and Power Sports : Amazon.com : Automotive
Daydreamer