recently got a c-tek 800m/a charger when my battery went dead. these chargers also have the capability of rejuvinating a slightly damaged battery. Also comes with the terminal bolt on attatchment which allows you to just plug it in when you need to and forget about removing the seat and using aligator clamps. just leave the plug in your airbox. Paid $108 for mine but i needed it then and there. Saw them in a Repco catalogue last week for $89
Only problem i had was it needed at least 6v back charge to turn the charger on. Had to kick my bike over and go for a quick ride to give it a bit of charge so that it could detect the battery.