#5801 Ages 3 and up User Manual BATTERY INSTALLATION / REPLACEMENT Doll: Open the fastener back closure of the doll's outfit to access the battery box. Use a screwdriver to open the battery door. Insert 4 x 1.5V AAA size Alkaline batteries. Replace battery door and tighten the screw. Side the ON-OFF switch to ON position. Put the battery box inside the doll and close the fastener, Hand Heidi Unit: 1 Use a screwdriver to open the battery door. Insert 3 x 1.5V AAA size Alkaline batteries 2.