Sun Joe ION16CS 16-Inch 4-Amp 40-Volt Cordless Chain Saw 40 V 4.0 Ah Eco Sharp rechargeable lithium-ion battery No pull cords, gas, tune-ups, carbon emissions or tangled extension cords Tool-less Chain Adjustment System Ideal for cutting limbs, firewood and logs up to 14.6 in thick Powerful 600 Watt brushless motor increases battery efficiency