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Conduct science experiments power your robotics creations and replace batteries using these PP3 Battery Snaps. Ideal for use in schools these battery snaps can be used to build circuits investigate electrical conductivity power small LED lights and so much more Supplied as a pack of 50 there are enough snaps for each pupil to take part in an exciting experiment. These battery snaps connect to 9-volt PP3 batteries and feature a red and black wire attachment.