FSA 70 Cordless Brushcutter – AK System

Part of STIHL’s interchangeable AK 36 V battery system, the FSA 70 R gives you petrol-class cutting without fuel, fumes or ear defenders. Its efficient EC brushless motor spins the supplied AutoCut C 6-2 head at up to 7,800 rpm across a 380 mm path, dispatching lawn edges and waist-high weeds in record time. A tool-less loop handle and top-loading line head make set-up and reloads quick, while two electronic speed levels—ECO for light trims, High for dense growth—let you balance run-time and power on the fly.

With an AK 20 battery installed the trimmer weighs about 4.8 kg and works for 25–45 minutes on line or up to 90 minutes with the PolyCut blade; upgrading to an AK 30 adds roughly 30% more run-time. Sound pressure is a neighbour-friendly 76 dB(A) and the four-point anti-vibration system keeps handles to 4.9 / 2.0 m/s², so you can trim early on a Sunday without disturbing anyone—or your wrists. Maintenance is minimal: the brushless motor is friction-free, and head changes need no tools; simply swap to the PolyCut 6-2 plastic-blade head when rough ground or battery stamina demands it.

Key features

• AK-System 36 V power — battery swaps with all AK blowers, chainsaws and mowers.
• 38 cm cutting width — AutoCut C 6-2 line head slices a wide swath; PolyCut blade compatible.
• Brushless EC motor — high torque, zero maintenance, two electronic speed levels.
• Low noise & vibration — 76 dB(A) sound pressure, 4.9 / 2.0 m/s² HAV.
• Lightweight design — 3.2 kg tool-only; 4.8 kg with AK 20 battery.

Technical highlights

Why it stands out

The FSA 70 R gives homeowners and estate caretakers petrol-grade clearing with whisper-quiet operation, instant start, low vibration and run-times long enough to edge 1,500 m of lawn or clear 300 m² of overgrowth on a single AK 20 charge—then slots the same battery into your STIHL hedge-trimmer or blower.