Polaris 2002 Snowmobile Owner's Manual page 157

Battery
When your snowmobile is placed in storage for one month or more:
DRemove the battery.
DCharge it to the proper level.
DStore it in a cool dry place.
Before using the battery, take it to your dealer for testing and
recharging.
Batteries may freeze if not fully charged, resulting in cell damage.
Charge Condition:
100%
75%
50%
25%
0%
Battery Installation
Batteries contain gases that can explode. If the battery vent
tube is pinched or kinked, battery gases could accumulate.
Whenever removing or installing the battery, disconnect the
negative (black) cable first and reinstall the negative cable last
to avoid the possibility of explosion.
Battery electrolyte contains acid. Avoid skin contact with
electrolyte as severe burns may result.
1 Place the battery in its holder. Attach the hold down strap.
2 Install the battery vent line. It must be free from obstructions and
securely installed. Route the vent line properly to prevent kinks and to
allow for proper drainage.
3 Connect and tighten the red (positive) cable first.
4 Connect and tighten the black (negative) cable last.
5 Verify that cables and vent hose are properly routed.
Will Freeze At:
-75° F (-59° C)
-24° F (-31° C)
0° F
+13° F (-11° C)
+18° F (-8° C)
WARNING
MAINTENANCE
(-18° C)
155