Dual battery isolator relay. Kawasaki KAT 820 Mule PRO FXT -- 2023. Kawasaki KRF1000A Teryx KRX 1000 -- 2023. Kawasaki KRT1000C Teryx KRX4 1000 SE -- 2023. These are great upgrades, until you are stuck with a dead battery and can?t start the engine!