All Jetson products go through vigorous testing and are built with the best components to ensure safety. All batteries are made and tested with current top tests and safety standards with UL 2272. UL Listed means that UL has tested represented samples of the product and determined that it meets their requirements. These requirements are based primarily on UL’s published and nationally recognized Standard for Safety. References to UL and the UL listing may include the UL Listing Mark, which is a hologram sticker placed on the bottom of your hoverboard.