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? Will the parts stay “on” when the bike is on my car rack? What happens when an eTap® 2x11 battery is low? Will the shifts slow down? Will the shifter work intermittently? What is the warranty on eTap® battery? Comments 0 comments Article is closed for comments.