This machine is eligible for "white glove" delivery to large parts of northern England, fulfilled by one of our 14 depots. See list of eligible postcodes.
STIHL AK20 Battery
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When we handover your new machine we will give you some instruction on the correct and safe use of your purchase. We will answer any questions you might have and also offer some instruction on basic maintenance to help you keep your new machine in good condition.
Product Accessories
Product Details & Features
The STIHL AK20 Battery is a high-quality lithium-ion battery designed to deliver dependable power and extended runtime for STIHL AK System cordless tools. Ideal for homeowners and domestic users, this battery provides an excellent balance of performance, weight and runtime for a wide range of garden maintenance tasks.
Built to STIHL’s trusted quality standards, the AK20 offers consistent power output, fast charging compatibility and long service life, making it a reliable choice for regular cordless garden work.
Key Features:
STIHL AK System Compatibility – Designed for use with all STIHL AK System cordless tools.
Lithium-Ion Battery Technology – Delivers consistent, fade-free power with no memory effect.
Balanced Runtime & Weight – Provides extended working time while remaining lightweight and easy to handle.
Integrated Charge Level Indicator – LED display allows quick checking of remaining battery charge.
Robust, Durable Construction – Built for reliability and long service life under regular use.
Fast Charging Compatibility – Compatible with STIHL AL chargers for efficient recharging.
Ideal For:
Cordless lawnmowers and trimmers
Hedge trimmers and blowers
Domestic garden maintenance
STIHL AK System users
Product Details:
Product Type: Lithium-Ion Battery
Battery System: STIHL AK System
Battery Technology: Lithium-ion
Charge Indicator: LED status display
Compatibility: STIHL AK cordless tools
Application: Domestic cordless garden power
Why Choose This Battery:
The STIHL AK20 Battery delivers dependable performance and excellent runtime for everyday garden tasks. Its lightweight design, reliable power output and compatibility across the STIHL AK System make it a practical, cost-effective solution for cordless tool users. Backed by STIHL’s proven engineering quality, it ensures consistent performance and long-term reliability.
Battery Charging Information:
The STIHL AK20 battery is compatible with a range of STIHL charging ports:
- AL101 Charger - 135 minutes to 80% charge and 180 minutes to 100% charge
- AL301 Charger - 30 minutes to 80% charge and 50 minutes to 100% charge
- AL301-4 Multi Charger 30 minutes to 80% charge and 50 minutes to 100% charge
- AL501 Charger - 30 minutes to 80% charge and 50 minutes to 100% charge
Charger sold separately.

Charge Indicator
At the push of a button, the charge indicator will display the remaining battery life.
Product Specifications
| Manufacturer | Stihl |
| Model | AK20 battery (4520 400 6518) |
| Weight | 1.2kg |
| Warranty | 2 years in domestic use |
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Pre-Delivery Inspection
All machines undergo a professional assembly and rigorous testing before we dispatch.
Free White Glove Delivery
All machines qualify for free delivery to the local area around our branches. Spare parts are delivered nationally.
Click & Collect
Place your order online and collect for free from our branches across northern England.
Official Dealer
We're official dealers of all the machines we sell, meaning we're qualified to give you the best aftersales support.



