2004 Skidoo Tundra Skandic Series Service Manual, Page 313Get this manual
Section 06 ELECTRICAL Subsection 04 (BATTERY)
Clean battery casing and caps using solution of baking soda and waterDo not allow cleaning solution to enter battery, otherwise it will destroy the electrolyteRinse battery with clear water and dry well using clean clothStore battery in cool dry placeSuch conditions reduce self-discharging and keep fluid evaporation to minimumDuring the storage period, recheck electrolyte level and specific gravity readings at least every 40 daysAs necessary, keep the battery at its upper level line and near full charge as possible (trickle charge)Skandic WTSWTSUV 550SUV 600 Disconnect and remove battery from the vehicleThe battery must always be stored in fully charged conditionClean battery terminals and cable connections using wire brushApply light coat of dielectric grease (PN 293 550 004) or petroleum jelly on terminalsClean battery casing using solution of baking soda and waterRinse battery with clear water and dry well using clean clothCharge the battery every month if stored at temperature below 15C (60F)Charge the battery every two weeks if stored at temperature above 15C (60F)