I just discovered that my team's EV3 rechargeable battery is defective. Apparently this is a common problem, but I wasn't aware of it until now! See: http://www.firstlegoleague.org/sites/default/files/LEGO/Message%20to%20Customers.pdf If you're having mysterious problems with the EV3 batteries not holding a charge and the EV3 not turning on after charging, that's most likely your problem. -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-ANNOUNCEMENTS-l.html to subscribe.