2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 212Get this manual
ELECTRICAL LOW MAINTENANCE BATTERY (SPORTSMAN 400 H.O
General Battery Information
NOTE: The Sportsman 400 H.Ouses "fresh pack" Low Maintenance battery that is filled at time of vehicle set-upCarefully review the battery installation instructions that are shipped with the ATV andor battery12Check battery voltage with voltohm meterA fully charged battery should be 12.8 or higherIf the voltage is below 12.8 V, the battery will need to be rechargedNOTE: Use voltohm meter to test battery voltageOPEN CIRCUIT VOLTAGE State of Charge 100 75 Charged 50 Charged 25 Charged Charged Maintenance Free 13.0 12.80 12.50 12.20 less than 12.0 YuMicronTM Type 12.70 12.50 12.20 12.0 less than 11.9 V