Harley-Davidson Advice on Avoiding Battery Abuse.
A motorcycle battery never gets a day off. The service experts at Harley-Davidson® point out that even when a motorcycle is parked the battery discharges continuously in small internal loads called “self-discharge.” Self-discharge speeds up drastically as the temperature rises – for example in a hot garage in the summer – and accessories like alarm systems will further increase the rate of discharge. If a battery is discharged too deeply, for too long, it may be permanently damaged. Instead of a V-Twin rumble, a push on the starter button produces … silence. And there goes a Saturday ride.