Does the Ranger need to be turned on while charging? August 17, 2021 22:26 Updated Yes, both the Ranger and the stock battery need to be turned on while charging. Related articles Why isn't my Ranger indicator showing 100% after initial install? How should I charge my bike after installing the Ranger? The Ranger Install Guide What kind of performance benefits will the Ranger give me? Will my battery gauge still be accurate after installing the Ranger?