I have not had this problem. I get consistent power/ battery performance at below 50%. I haven't taken my battery less than 20% though, so I can't speak for below 20%. I have a CrossTour with 2300w motor with Archon controller.What is everyone's experience with battery performance? Do you get consistent power down to low battery %? I have been tracking % on the bluetooth app and after 50% power seems to drop off quite noticeably. Yesterday, I got about 18-20 miles on city streets in level 1-3 (mainly 1 and 2). I had 35% power left at the end of the ride but it felt like it was in limp home mode.