The AP System is powered by 36 V Lithium-Ion batteries. The high quality cells are aligned in a way so constant power is delivered to the tool over impressive run times. The AP System offers both handheld and backpack batteries so you can choose the right battery for the job at hand. The interchangeable nature of the batteries with AP System tools offers an economical solution to professional work. With a range tools suitable for felling trees, maintaining thick hedges and brush cutting, there is a cordless machine for every job.