2002 Polaris Freedom, Virage, Genesis PWC Service Manual, Page 257Get this manual
Electrical Systems Specific Gravity Test
A tool such as the battery hydrometer can be used to measure electrolyte strength or specific gravityAs the battery goes through the charge-discharge cycle, the electrolyte goes from heavy (more acidic) state at full charge to light (more water) state when dischargedThe hydrometer can measure state of charge and differences between cells in multi-cell batteryReadings of 1.270 or greater should be observed in fully charged batteryDifferences of more than .025 between the lowest and highest cell readings indicate need to replace the battery
Open Circuit Voltage
STATE OF CHARGE 100 Charged 75 Charged 50 Charged 25 Charged Charged CONVENTIONAL LEAD-ACID 12.60V 12.40V 12.10V 11.90V less than 11.80V YUMICRON TYPE 12.70V 12.50V 12.20V 12.0V less than 11.9V
Specific Gravity
STATE OF CHARGE 100 Charged 75 Charged 50 Charged 25 Charged Charged CONVENTIONAL LEAD-ACID 1.270 1.210 1.160 1.120 less than 1.100 YUMICRON TYPE 1.275 1.225 1.175 1.135 less than 1.115