2007-2008 Polaris IQ Snowmobiles Service Manual, Page 289Get this manual
Battery and Electrical Systems BATTERY TESTING
Testing Procedures
Batteries should be kept at or as near full charge as possibleIf the battery is stored or used in partially charged condition, hard crystal sulfication will form on the plates, reducing their efficiency and possibly ruining the battery
Battery Voltage Per Cell
STATE OF CHARGE CONVENTIONAL LEAD-ACID YUMACRON TYPE
100 CHARGED 75 CHARGED 50 CHARGED 25 CHARGED CHARGED
1.265v 1.210v 1.160v 1.120v1.100v
1.275v 1.225v 1.175v 1.135v1.115v