All electrical systems of your UNU E-scooter components like the headlights, turn signals, horn, display, and more are powered by the 12V AUX battery. If the battery loses power over time, the scooter may no longer start correctly or some functions may be limited. To ensure all systems continue to function smoothly, the 12V AUX battery should be replaced as soon as any loss of power is noticeable. This will keep your scooter fully operational and reliable.