Revolution professional handheld products run on our 60V Max Flex-Force Power System and work with our entire line of Revolution commercial grade handheld tools. The backpack, available as a power source for our leaf blower, and string and hedge trimmers, is built for comfort and ready to keep jobs moving all day long. It has the capacity for you to swap batteries, so when one battery is done, you're not done. Our 60V power comes to you fast: just 50 minutes to charge our largest battery to 100% and easily outpacing the charging speed of larger, lower voltage batteries. *Battery manufacturer rating = 60V maximum & 54V typical usage. Actual voltage varies with load.