A game-changer in the world of landscaping, the new STIHL AR 900 backpack battery powers all handheld products in the innovative STIHL Battery KombiSystem and delivers the extended product run times professionals have been asking for up to 11 hours increasing the size of jobs that can be tackled with maximum efficiency. This super-charged lithium-ion backpack battery generates up to ten times more power than other STIHL Battery KombiSystem batteries, all with zero-exhaust-emissions and no gasoline expense.