Thomas The Train Trackmaster Motorized Engine+ Cargo Car 2009 Mattel Works PVC It uses 3 AAA batteries that are not included for storage and shipping purposes. The batteries go in the freight car. Remove the philips head screw, next to the on/off switch, and the top of the car comes off to reveal the battery compartment. There are scratches on the right side of the engine. See photos for details. Thank you for looking.