Originally Posted by TrueFaith
Pick up a Battery Tender Jr. and keep it hooked up to the battery when the bike is not being ridden. They're like $20.
I will second the Battery Tender idea; I have two of them, a Jr for my tractor in the shed and a regular one that gets rotated from motorcycle to motorcycle to a spare battery I keep in the shop. They are great for keeping batteries topped off, especially during the winter storage months....