To change the batteries of Bo's Firefighter Hat, please follow these steps: 

  1. Open the battery door with a screwdriver. 
  2. If used batteries are present, remove batteries from the unit by pulling up on one end of each battery. Do not remove or install batteries using metal tools. 
  3. Install 3 LR44 new batteries inside the battery compartment.
  4. Replace the battery door securely.