How far can I ride on a fully charged derailleur eTap® 2x11 battery? November 26, 2019 16:52 Updated At full charge under normal use, the system will provide one month of riding or 1000+ kilometers (over 620 miles). Related articles How do I know when to charge the eTap® 2x11 derailleur or replace the shifter batteries? How long do the eTap® 2x11 shifter batteries last? What happens when an eTap® 2x11 battery is low? Will the shifts slow down? Will the shifter work intermittently? Will the parts stay “on” when the bike is on my car rack? What is the warranty on eTap® battery?