2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 41Get this manual
MAINTENANCE Battery Removal (Sportsman 300)
1Open the front storage box cover to access the batteryBattery
Battery Removal (Sportsman 400 H.O
1Remove the splash shield behind the right front tireRemove Splash Shield
Disconnect the battery hold-down strapRemove the battery vent tubeDisconnect battery negative (-) (black) cable first, followed by the positive (+) (red) cable