Each ball comes with 3 x L1142 batteries which should give a four to five hour glow MMX glow balls are the ideal balls for outdoor shows. New shell made by PLAY. Softer for fantastic grip and to withstand the toughest drops, even on concrete. The light diffusion is just perfect, by far the best glitter ball on the market for its price range. Each ball comes with 3 LR44 batteries which should give a four to five hour glow. Batteries are available at most hardware stores or supermarkets. The battery compartment is recessed inside the ball - you activate the balls by turning the screw cap that hides under the surface of the ball. To avoid damaging the screw cap, it is recommended not to juggle the balls off, a fall of the cap could damage the plastic thread.