2008 Polaris Ranger RZR Service Manual, Page 303Get this manual
ELECTRICAL Charging Procedure (Low Maintenance)
If battery voltage is 12.8 or less, the battery may need rechargingWhen using an automatic charger, refer to the charger manufacturer's instructions for rechargingWhen using constant current charger, use the following guidelines for rechargingNOTE: Always verify battery condition before and 1-2 hours after the end of charging
STARTING SYSTEM
Troubleshooting
Starter Motor Does Not Run Battery dischargedLow specific gravity Loose or faulty battery cables or corroded connections (see Voltage Drop Tests) Related wiring loose, disconnected, or corroded
WARNING
An overheated battery could explode, causing severe injury or deathAlways watch charging times carefullyStop charging if the battery becomes very warm to the touchAllow it to cool before resuming chargingBattery Charging Reference Table State of Charge Voltage Action Charge Time