2010 Polaris Sportsman 850 Service Manual, Page 341Get this manual
ELECTRICAL BATTERY SERVICE
Battery Specifications Battery PN 4011496
Type Voltage Nominal Capacity 10 HR Rate CCA Nominal Open Circuit Voltage Recommended Charging Rate PolarisYuasa YTX20HL-BS SealedMaintenance Free 12 Vdc 18 AH 310 12.8 Vdc or more1.8A 5-10 HR 312Check battery voltage with voltohm meterA fully charged battery should be 12.8 or higherIf the voltage is below 12.6 V, the battery will need to be recharged (see "Charging Procedure")
IMPORTANT: Never attempt to add electrolyte or distilled water to Maintenance Free batteryDoing so will damage the case and shorten the life of the batteryTo service Maintenance Free battery: 12Remove battery from the vehicle (see Chapter 2)Test battery with voltage meter or load tester to determine battery conditionThis will determine the length of time required to charge the battery to full capacityRefer to OCV table (see "OCVOpen Circuit Voltage Test")Charge the battery as recommended (see "Charging Procedure")
General Battery Information WARNING
CALIFORNIA PROPOSITION 65 WARNING: Batteries, battery posts, terminals and related accessories contain lead and lead compounds, and other chemicals known to the State of California to cause cancer and birth defects or other reproductive harmWASH HANDS AFTER HANDLING