2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 415Get this manual
ELECTRICAL Low Maintenance Battery Charging
If battery voltage is 12.8 or less, the battery may need rechargingWhen using an automatic charger, refer to the charger manufacturer's instructions for rechargingWhen using constant current charger, use the following guidelines for rechargingNOTE: Always verify battery condition before and 12 hours after the end of charging
Low Maintenance Battery InspectionRemoval
The battery is located on the rear, left-side of the frame1Remove the seat and Disconnect holder strap2Disconnect battery negative (-) (black) cable first, followed by the positive (+) (red) cable
CAUTION
Whenever removing or reinstalling the battery, disconnect the negative (black) cable first and reinstall the negative cable last! 3Remove the battery
WARNING
An overheated battery could explode, causing severe injury or deathAlways watch charging times carefullyStop charging if the battery becomes very warm to the touchAllow it to cool before resuming charging