2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 42Get this manual
MAINTENANCE 6Tilt the battery on its side while you lift the battery upOnce you lift the battery out of the holder, turn the battery so the top is facing you as you remove the battery through the right front wheel wellTilt Battery to Remove
Battery Charging Harness (400 H.O
The Sportsman 400 H.Ois equipped with remote battery charging harnessThis harness is pre-wired from the factory to allow battery charging without having to remove the battery from the ATVThe charging harness is equipped with two-wire molded connector, designed to be used with the YUASA 1.5 Amp Battery Charger (PN 2859044)
Battery Installation (Sportsman 400 H.O