To charge the hoverboard, you must plug in the charger into a wall socket, and then connect it to your hoverboard. On connection with the power outlet, you will notice a small green light on the charger. On the battery of the hoverboard, you will notice a small red colored light. This means that the hoverboard is charging. Let the board charge for a couple of hours. Once the battery if fully charged, the color of the light will change from red to green.