2008 Polaris Sportsman 700/800/700 X2 EFI Service Manual, Page 356Get this manual
ELECTRICAL 6Install clear battery vent tube from vehicle to battery vent
WARNING
Vent tube must be free from obstructions and kinks and securely installedIf not, battery gases could accumulate and cause an explosionVent should be routed away from frame and body to prevent contact with electrolyteAvoid skin contact with electrolyte, as severe burns could resultIf electrolyte contacts the vehicle frame, corrosion will occur7Route cables so they are tucked away in front and behind battery