AK System Battery

AK System Battery

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Compatible with the tools in the STIHL AK System of battery-powered tools, these are  lightweight 36 V Lithium-Ion batteries. They feature a charge level indicator on the top with four LEDs so you can see how much charge you have left quickly and easily, at the touch of a button. 

  • The run time for these batteries depends on which tool you are using it in.


LED charge level indicator

There are four LEDS on the battery to indicate the charge level of the battery. Simply press the button to see how much battery life is left.

Intelligent electronics

STIHL batteries feature an intelligent battery management system - this clever technology gives a constant level of power whether the battery is 100% charged or 1% charged. To find out more about the intelligent electronics in our battery, check out our blog post.


QWhat tools can I use this battery in?

These batteries will fit in any of the tools in the AK System. The AK 10 is the recommended battery for the FSA 57 grass trimmer and the HSA 56 hedge trimmer. The other tools in the range use more power so either the AK 20 or AK 30 batteries, which have a higher capacity, will be more suitable for the other tools.

QHow long does it take to charge?

Using the AL 101 charger, you can fully charge the AK 10 battery in 95 minutes, or you can charge it to 80% in 70 minutes.

QCan I charge it any quicker?

We make two fast chargers, the AL 301 and AL 500.


#1Looking after your battery

Don't use a damp or wet battery in your tools and avoid using them in extreme temperatures (very hot or very cold). To find out more about looking after your battery, read our blog post.

#2Storing your battery

Take your battery out of the tool you have used it in and store it separately in a clean, dry place out of direct sunlight and ideally in some packaging, such as cardboard, to protect it, at a temperature between -10°C and 50°C. Don't forget to keep it out of reach of children.

Technical Specifications

Battery cell technology Lithium-Ion
AK 10 Battery weight kg 0.8
AK 10 Battery energy Wh 72
AK 10 Rated voltage (V) V 36
AK 20 Battery weight kg 1.2
AK 20 Battery energy Wh 144
AK 20 Rated voltage (V) V 36
AK 30 Battery weight kg 1.3
AK 30 Battery energy Wh 180
AK 30 Rated voltage (V) V 36 


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