How do I replace the batteries? Jes Jakobsen December 06, 2017 11:23 Updated The batteries in UGO can easily be replaced by removing the silicone. UGO uses two CR2032 lithium batteries. Related articles What kind of batteries are used for Reelight GO? GO What kind of battery is used for UGO? I just bought a new bicycle with roller brakes and would like to move my Hub Lights for V-brakes (SL100) to this. Is this possible? Why is it important to know the brake type?