It was a real pain to keep unscrewing the screws to take the cover off Loo Boo's battery compartment to replace the batteries so we came up with this idea that seems to work really well. We glued 2 magnets in the battery compartment recesses where the screws normally go and then removed the pillars on the battery compartment lid and replaced them with 2 magnets. It works a treat. The magnets we used were 8mm diameter and 2mm thick. We got them from Spider Magnetics Ebay UK and they only cost £2.49 for 10. See photos in the Gallery.