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Free Delivery
Free Delivery
Free Delivery
Free Delivery
AK 20 Battery
SKU: Stihl | LI-4520 400 6535
- Regular price
- £96.75 Ex VAT
- £116.10 Inc VAT
- RRP: £107.50 Ex VAT
- Sale price
- £96.75 £96.75 Ex VAT
- Regular price
-
- £116.10 £116.10 Inc VAT
- Was £107.50 Ex VAT
Free Delivery Over £75 *
Worldwide Shipping from the UK
Trusted UK Arborist Retailer
30-Day Easy Returns
Product information & specifications
STIHL AK 20 Battery – 36V 144Wh Lithium-Ion Battery
The STIHL AK 20 Battery is a powerful 36V lithium-ion battery designed for tools in the STIHL AK System. With a 4.0Ah capacity, 144Wh battery energy and a weight of 1.2kg, it offers a strong balance of runtime, handling and performance for homeowners maintaining gardens, lawns, hedges and outdoor spaces.
Built with STIHL intelligent battery management, the AK 20 delivers CONSTANT POWER output so compatible tools maintain consistent performance as the battery discharges. Four practical LED indicators clearly show the remaining charge level, helping you plan work and recharge when required.
Key Features
- Genuine STIHL AK 20 lithium-ion battery
- 36V battery for STIHL AK System tools
- 4.0Ah capacity with 144Wh battery energy
- Lightweight design weighing 1.2kg
- Integrated LED charge indicator
- CONSTANT POWER output for consistent tool performance
- Intelligent battery management system
- Cold start feature protects cells in low temperatures
- Compatible with AL 101, AL 301 and AL 501 chargers
- Ideal for demanding domestic garden tasks
Powerful AK System Battery
The AK 20 battery powers tools within the STIHL AK System, making it a versatile choice for garden maintenance equipment including compatible mowers, hedge trimmers, grass trimmers, blowers and selected cordless saws.
Consistent Battery Performance
STIHL CONSTANT POWER technology helps compatible cordless tools maintain a consistent level of output throughout the battery charge, rather than gradually losing performance as the battery runs down.
LED Charge Indicator
Four integrated LEDs show the battery charge level clearly, making it easy to check remaining power before starting work or during longer garden maintenance tasks.
Cold Start Protection
The AK 20 includes a cold start feature that helps protect the battery cells by warming them in a controlled way before delivering full power. This allows operation in temperatures down to -20°C.
Compatibility Notes
- Compatible with tools in the STIHL AK System range
- Compatible with STIHL AL 101, AL 301 and AL 501 chargers
- Provides full power with most AK System tools
- Reduced power with MSA 70 chainsaw and REA 60 PLUS pressure washer
- Cannot be used with the MSA 80 chainsaw
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | STIHL AK 20 Battery |
| Battery System | STIHL AK System |
| Battery Type | Lithium-ion |
| Voltage | 36V |
| Capacity | 4.0Ah |
| Battery Energy | 144Wh |
| Weight | 1.2kg |
| Charge Indicator | 4 LED indicators |
| Compatible Chargers | AL 101, AL 301, AL 501 |
Ideal For
- Homeowners using STIHL AK System tools
- Garden maintenance and seasonal outdoor work
- Battery-powered mowing, trimming and hedge cutting
- Users needing longer runtime than smaller AK batteries
- Domestic users wanting reliable STIHL cordless performance
Explore More
Best For
The STIHL AK 20 Battery is best suited to homeowners who need a versatile 36V battery with strong runtime and consistent power for compatible STIHL AK System garden tools.
Why Choose the STIHL AK 20 Battery?
With 144Wh energy, CONSTANT POWER performance, LED charge display and intelligent battery management, the STIHL AK 20 is a dependable choice for regular cordless garden maintenance.
Battery Specifications
STIHL AK 20 Battery – 36V 144Wh Lithium-Ion Battery
The STIHL AK 20 Battery is a powerful 36V lithium-ion battery designed for tools in the STIHL AK System. With a 4.0Ah capacity, 144Wh battery energy and a weight of 1.2kg, it offers a strong balance of runtime, handling and performance for homeowners maintaining gardens, lawns, hedges and outdoor spaces.
Built with STIHL intelligent battery management, the AK 20 delivers CONSTANT POWER output so compatible tools maintain consistent performance as the battery discharges. Four practical LED indicators clearly show the remaining charge level, helping you plan work and recharge when required.
Key Features
- Genuine STIHL AK 20 lithium-ion battery
- 36V battery for STIHL AK System tools
- 4.0Ah capacity with 144Wh battery energy
- Lightweight design weighing 1.2kg
- Integrated LED charge indicator
- CONSTANT POWER output for consistent tool performance
- Intelligent battery management system
- Cold start feature protects cells in low temperatures
- Compatible with AL 101, AL 301 and AL 501 chargers
- Ideal for demanding domestic garden tasks
Powerful AK System Battery
The AK 20 battery powers tools within the STIHL AK System, making it a versatile choice for garden maintenance equipment including compatible mowers, hedge trimmers, grass trimmers, blowers and selected cordless saws.
Consistent Battery Performance
STIHL CONSTANT POWER technology helps compatible cordless tools maintain a consistent level of output throughout the battery charge, rather than gradually losing performance as the battery runs down.
LED Charge Indicator
Four integrated LEDs show the battery charge level clearly, making it easy to check remaining power before starting work or during longer garden maintenance tasks.
Cold Start Protection
The AK 20 includes a cold start feature that helps protect the battery cells by warming them in a controlled way before delivering full power. This allows operation in temperatures down to -20°C.
Compatibility Notes
- Compatible with tools in the STIHL AK System range
- Compatible with STIHL AL 101, AL 301 and AL 501 chargers
- Provides full power with most AK System tools
- Reduced power with MSA 70 chainsaw and REA 60 PLUS pressure washer
- Cannot be used with the MSA 80 chainsaw
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | STIHL AK 20 Battery |
| Battery System | STIHL AK System |
| Battery Type | Lithium-ion |
| Voltage | 36V |
| Capacity | 4.0Ah |
| Battery Energy | 144Wh |
| Weight | 1.2kg |
| Charge Indicator | 4 LED indicators |
| Compatible Chargers | AL 101, AL 301, AL 501 |
Ideal For
- Homeowners using STIHL AK System tools
- Garden maintenance and seasonal outdoor work
- Battery-powered mowing, trimming and hedge cutting
- Users needing longer runtime than smaller AK batteries
- Domestic users wanting reliable STIHL cordless performance
Explore More
Best For
The STIHL AK 20 Battery is best suited to homeowners who need a versatile 36V battery with strong runtime and consistent power for compatible STIHL AK System garden tools.
Why Choose the STIHL AK 20 Battery?
With 144Wh energy, CONSTANT POWER performance, LED charge display and intelligent battery management, the STIHL AK 20 is a dependable choice for regular cordless garden maintenance.
Battery Specifications
Delivery & Returns
UK Delivery
Fast, reliable delivery from our UK warehouse.
- FREE UK Standard Delivery
applies to eligible UK orders over £75 ex VAT.
Estimated delivery: 2–4 working days
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days
- Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.
UK Delivery
Fast, reliable delivery from our UK warehouse.
- FREE UK Standard Delivery
applies to eligible UK orders over £75 ex VAT.
Estimated delivery: 2–4 working days
- UK Standard Delivery from £3.60 + VAT
Estimated delivery: 2–4 working days
- Next Working Day Delivery – £6.00 + VAT
Order before 3:00pm (Monday–Friday) for next working day delivery
All UK orders are dispatched Monday–Friday and sent via a tracked courier service.
International Delivery
We ship worldwide from the UK.
- Europe from £10.00
Estimated delivery: 2–7 working days - Rest of the World from £12.00
Estimated delivery: 2–11 working days
Shipping costs and delivery times are calculated at checkout based on destination and order contents.
Customs, Duties & Taxes
International orders may be subject to local import duties, taxes, or customs charges.
When UPS is selected at checkout, applicable duties and taxes are included in the total price. For other shipping services, duties and taxes may be charged separately on delivery and are the responsibility of the recipient.
Customs processing times may affect delivery estimates.
Returns
30-Day Return Policy
- Items can be returned within 30 days of delivery
- Products must be unused and in original condition
- Return postage costs apply unless the item is faulty or incorrect
For full details, please visit our Shipping & Returns page.
