The STIHL® AK 20 is a versatile, mid‑capacity lithium‑ion battery designed for STIHL® AK System battery‑powered tools. Offering a strong balance of runtime, weight, and performance, this battery is well suited for homeowners and professionals handling medium‑duty trimming, cutting, and cleanup tasks.

Key Features

• 36V lithium‑ion battery delivers consistent power throughout the discharge cycle
• Increased capacity compared to entry‑level AK batteries for longer run times
• Lightweight, compact design maintains excellent tool balance
• LED charge indicator displays remaining battery capacity
• Designed to deliver full power until depleted
• Durable construction supports long service life
• Compatible with STIHL® AK System chargers
• Ideal for use with AK System hedge trimmers, blowers, trimmers, and chainsaws

(Model number 4520‑400‑6536)

Why It’s a Smart Pick

The STIHL® AK 20 is a smart pick for users who want extended runtime without significantly increasing weight. Its balanced capacity and broad tool compatibility make it an excellent everyday battery for maintaining residential and light commercial properties.