The board's range is pretty damn impressive—seven miles on "eco-mode" (or easy mode) and six miles in “expert mode,” which increases your top speed. I kept it in “expert mode” the entire time and it never died on me (full disclosure: I never used it to do a full commute to work, or outright tested the range limit, but I did spend numerous days riding it all over town). If you do happen to find yourself out of battery, you can always push the board like a boring, unmotorized, regular skateboard, which, believe it or not, is surprisingly easy to do.
After a full day riding, I’d plug the board in to charge, which took a little over an hour. And though it could get annoying to carry around the charger in your backpack, you could easily swing into a coffee shop to charge up if the battery died on a particularly long jaunt.