The most powerful 36-volt battery in the STIHL AK Series.When it comes to getting the most out their AK Series battery-powered products, users can depend on the AK 30 battery for the longest run times and most power of any AK battery. The AK 30 has a long service life with the ability to withstand up to 1,500 charge cycles. Delivering the longest run times within the AK Series, the AK 30 battery allows users to tackle jobs and get more done on a single charge.Run time may vary based charge level and operating style.Run time may vary based charge level and operating style.