If your operator machine has batteries, you will need to determine if they are sealed or if they will need water added. Check and add water quarterly or more often if needed and be sure to check for any corrosion as well. Most batteries will need to be replaced between two and four years of service, depending on the usage. This can be a do-it-yourself project in some cases. In others, it may be best to have us do it since control boards must be removed, which is a job that requires professional care to avoid damaging sensitive components.