Electric 9V Battery Box Small with Red 'LL-6482' on Yellow Background Pattern, LEGO® Part# 4760c01pb03. Appears in set# 6482-1 (Rescue Helicopter). This part is used to power electric light and sound bricks from these years. Comes in white. 

Each one has been tested to ensure they work. 

To learn more about the parts we offer or if you have any questions call us at our storefront at 470-414-2208 and we'll be happy to help.