This is underneath the arm of the wheelchair in a horizontal position. Usually it is flat and the steering is on the top. You have a special plug attached to the charger. The charger is connected to the electricity and when the control light on the charger turns to green, it is reloaded. I usually leave it for a complete night. At night our electricity is half price. When recharged I can travel about 30-40 kilometers depending on how I drive. lower gears use more power, but speeding along in 3rd gear 10 kilometers per hour is a little risky.