Poulan Pro 501099501 4Ah 146 Wh 40V Replacement Battery The Poulan Pro 4Ah Lithium-Ion Battery powers any tool in our 40-Volt Cordless family: Axial Blower, Chainsaw, Hedge Trimmer, Pole Saw, String Trimmer, Mower Battery Holds charge for up to a year without harming the battery when stored in recommended conditions in accordance with your instruction manual. Dual Lithium-Ion Battery system runs at full power for the complete charge Easy to read Battery Charge Indicator lights for power level check