How do I change the batteries on the Rival 3 Wireless Related Searches Mice SteelSeries Slide the Battery Cover down to remove it. Insert either one or two AAA Batteries (included) into the Battery Compartment(s) with the minus side first. Slide the Battery Cover back onto the mouse Related articles How do I check the battery level on Rival 3 Wireless How do I use my Rival 3 Wireless with Bluetooth What kind of batteries does the Rival 3 Wireless use How do I pair my Rival 3 Wireless via 2.4 GHz I lost / damaged my Rival 3 Wireless Dongle