The Swagtron T1‘s battery lasts for about 7-12 miles of usage. It depends on your weight and exactly how you ride it. 7-12 miles is a standard range for hoverboards.
For a normal human, 7 miles is a LOT of hoverboard riding. It will be a long time before you’re physically able to ride it that long without taking a big break. You may think that riding a hoverboard is for a lazy person. Actually, it is an incredible workout because you’re constantly using your core, glutes, and other muscles.