2005-2007 Polaris Ranger 500 service manual, Page 320Get this manual
ELECTRICAL SPECIFIC GRAVITY State of Charge 100 Charged 75 Charged 50 Charged 25 Charged Charged Conventional Lead-Acid 1.265 1.210 1.160 1.120 less than 1.100 YuMicronTM Type 1.275 1.225 1.175 1.135 less than 1.115 Using wire brush or knife, remove any corrosion from the cables and terminals Make sure that the electrolyte is at the proper levelAdd distilled water if necessary Charge at rate no greater than 110 of the battery's amphr capacity until the electrolyte's specific gravity reaches 1.270 or greater Store the battery either in the machine with the cables disconnected, or store in cool placeNOTE: Recharge to full capacity every 30 to 60 days during non-use periodIf the battery is stored during the winter months, electrolyte will freeze at higher temperatures as the battery dischargesThe chart below indicates freezing points by specific gravityElectrolyte Freezing Points Specific Gravity of Electrolyte 1.265 1.225 1.200 1.150 1.100 1.050 Freezing Point -75 -35 -17 +5 +18 +27 F