With the Stihl ap 20 lithium-ion battery, you deliver consistent 36V power and 4.0 Ah (144 Wh) capacity to your tools across the Stihl ap system. Weighing just 1.3 kg, it keeps your hedge trimmers, grass trimmers, and leaf blowers perfectly balanced for agile and fatigue-free yard maintenance. Four integrated led indicators give you an instant overview of your remaining charge so you can plan your work without interruption. Thanks to its IPX4 splash-water protection, you can rely on dependable cordless performance even in damp weather, while recharging conveniently with chargers like the al 101, al 301, or al 501.