Product details:

For users of AK Series products looking for the next level of performance at a great value, the AK 20 battery not only delivers double the capacity of the AK 10, but it still features the innovative benefits that make the AK Series of batteries a dependable and high-performing battery-powered option. The AK 20 has a long service life with the ability to withstand 1,500 charge cycles. Run time may vary based charge level and operating style.