My battery gauge is moving around to different levels while riding

The battery gauge can fluctuate while riding due to changes in acceleration and speed. 

To get an accurate representation of how much charge is left in your battery, the scooter should not be in motion. 

While you are riding or accelerating, it's possible to loose 1 or 2 bars on your LCD display.  Once you come back a stop, the battery indicator should return back to a normal level that will provide the most accurate charge level at resting state.