The Stihl AK 20 battery delivers 144Wh of energy at 36V, featuring a 4.0Ah lithium-ion cell designed for Stihl AK System tools. Robust and long-lasting, it stands up to demanding gardening tasks and is perfect for homeowners tackling outdoor projects.

A built-in LED indicator clearly shows the remaining charge, while an intelligent battery management system provides consistent power output whether fully charged or nearly depleted. The cold start feature gently warms the cells before delivering full power, enabling use down to -20°C.

Compatible with AL 101, AL 301, and AL 501 charger units. The AK 20 provides full power for all compatible tools except the MSA 70 chainsaw and REA 60 PLUS pressure washer, and cannot be used with the MSA 80 chainsaw.

• Lithium-ion battery – provides reliable power for Stihl AK System tools
• Intelligent management system – delivers consistent power output at any charge level
• Cold start feature – warms the cells to enable safe use down to -20°C
• LED indicators – clearly show the charging status and remaining power
• Available in a choice of sizes

Delivery (UK mainland only)

 

Next Day: £5, or FREE over £40

- Order by 9pm Mon-Thu: next working day

- Order Fri to 5pm Sun: Monday

- Order after 5pm Sun: Tuesday

 

Pre-12pm: £10

- Same cut-offs as Next Day above

 

Saturday & Sunday: £10, or £5 over £40, or FREE over £75

- Saturday: order by 6pm Fri

- Sunday: order by 4pm Sat

 

Heavy items (over 30kg)

- Mon-Fri only. Order by 6pm and allow up to two working days

- Order after 6pm Thu: arrives after the weekend

 

Supplier items

- Sent directly by the supplier, so timings vary. Lead times appear on the product page in working days (Mon-Fri)

 

More about delivery 

Next Business Day Collection (eligible items)

- Order by 9pm Mon-Thu: collect next day

- Order after 9pm Thu to 5pm Sun: collect Monday

- Heavy items (over 30kg): allow up to two working days

 

Opening hours

- Weekdays vary by branch: open 6:30am-7am, close 6pm-8pm

- Saturday: 7am-6pm

- Sunday: 9am-4pm

 

Check your local store's hours and that it's open before visiting. Please wait for our text or email before collecting.

 

Holding your order
We'll hold it for 14 days, then automatically refund your original payment method.