I agree with Jack, Bubbie and Bodeen. However, I would like to mention your.75 amp charger may be a good battery tender which will add life to your battery depending on how much you ride. My point is this is a great example of use the proper tool for the job. What I mean by that is if you are just maintaining a battery use a good tender so the battery does not get over charged or cooked. If a battery gets severely discharged from leaving a light on etc use a good charger to bring the charge back up before running the bike, don't want to put unnecessary strain on the charging system.