If you live up north where we do, right now your bike is sitting in the garage under a cover waiting for Spring and warm weather. Your battery is also sitting there gradually losing its charge. If you don't keep it charged, not only will your first riding day be delayed when your bike won't crank but the life of your battery will be shortened if it goes completely dead.
Get a Battery Tender! This little powerhouse will bring a completely dead battery back up to full charge and the advanced control system will sense full charge and drop down into a maintenance mode to keep the battery at just the right voltage. This model works with all types of batteries and is the last charger you'll need. There are a lot of different models out there, this is the good one! It's the number 1 selling charger in the entire powersports industry. You need this. We use it on our bikes and recommend it to all of our customers.