Required for REV Gen4 sleds without battery for LinQ Deep Snow Seat Bag (860201274) and for improved esthetics Fits Freeride, Summit Required for REV Gen4 sleds without battery for seat bag use and for improved?�esthetics. Sold each Brand new, genuine Ski-Doo Black Low Profile Snowmobile Battery Cover, Rev Gen4. This is a factory original equipment accessory, not aftermarket.