1. Einleitung
This manual provides essential instructions for the safe and efficient use, setup, operation, and maintenance of your Stihl AK20 Lithium-Ion Battery. Please read this manual thoroughly before using the battery and keep it for future reference. The Stihl AK20 is a compact 36V, 118Wh lithium-ion battery designed for the Stihl Compact cordless power system, featuring an LED charge level indicator.
2. Sicherheitshinweise
Always observe the following safety precautions to prevent injury and damage to the battery or connected equipment.
- Lies alle Anweisungen: Lesen Sie vor der Verwendung des Akkus alle Anweisungen und Warnhinweise auf dem Akku, dem Ladegerät und dem Produkt, das den Akku verwendet.
- Laden: Only charge the battery with Stihl-approved chargers (AL 101, AL 100, AL 300, AL 500). Using an incompatible charger may result in fire, electric shock, or injury.
- Kurzschlüsse vermeiden: Do not short-circuit the battery terminals. This can cause severe burns or fire.
- Temperatur: Do not store or use the battery in temperatures exceeding 40°C (104°F) or below -10°C (14°F). Extreme temperatures can damage the battery and pose a fire risk.
- Wassereinwirkung: Do not expose the battery to water or rain. If the battery becomes wet, do not use it.
- Schaden: Verwenden Sie keine beschädigten oder veränderten Batterien. Beschädigte Batterien können unvorhersehbares Verhalten zeigen, was zu Bränden, Explosionen oder Verletzungsgefahr führen kann.
- Entsorgung: Dispose of batteries responsibly according to local regulations. Do not dispose of batteries in fire.
- Kinder: Bewahren Sie Batterien außerhalb der Reichweite von Kindern auf.
3. Einrichtung
3.1 Auspacken
Carefully remove the Stihl AK20 Lithium-Ion Battery from its packaging. Inspect the battery for any signs of damage. If any damage is observed, do not use the battery and contact your dealer.

Abbildung 1: Vorderseite view of the Stihl AK20 Lithium-Ion Battery, showing the Stihl logo and LED charge indicator.
3.2 Erstaufladung
Before first use, fully charge the AK20 battery. Connect the battery to a compatible Stihl charger (AL 101, AL 100, AL 300, or AL 500). The charger's indicator lights will show the charging status. Refer to your charger's manual for specific charging instructions.
3.3 Einlegen der Batterie in ein Werkzeug
Align the battery with the battery compartment of your compatible Stihl cordless power tool. Push the battery firmly into the compartment until it clicks into place. Ensure the battery is securely seated before operating the tool.

Abbildung 2: Oben view of the Stihl AK20 Lithium-Ion Battery, showing the connection terminals and warning labels.
4. Bedienung der Batterie
4.1 Checking Charge Level
The Stihl AK20 battery features an LED charge level indicator. Press the button next to the LEDs to display the current charge status. The number of illuminated LEDs indicates the remaining charge:
- 4 LEDs: Volle Ladung
- 3 LEDs: ungefähr 75 % Ladung
- 2 LEDs: ungefähr 50 % Ladung
- 1 LEDs: Niedriger Akkustand, bitte bald wieder aufladen.
- Blinkende LED: Battery is critically low or has an error.
4.2 Using with Compatible Tools
Once inserted and fully charged, the AK20 battery is ready to power your compatible Stihl cordless tools. The battery life will vary depending on the specific tool and the intensity of use. Always refer to your tool's instruction manual for optimal usage guidelines.
5. Wartung
5.1 Ladevorgänge
Always charge the battery in a well-ventilated area, away from flammable materials. Do not leave the battery on the charger indefinitely after it is fully charged. Disconnect the battery from the charger once charging is complete to prolong battery life.
5.2 Speicherung
For optimal battery longevity, store the AK20 battery in a cool, dry place, ideally between 10°C and 20°C (50°F and 68°F). Store the battery with a partial charge (around 50-75%) if it will not be used for an extended period. Avoid storing fully discharged or fully charged batteries for long durations.
5.3 Reinigung
Keep the battery terminals clean and free from dirt or debris. Use a dry, soft cloth to wipe the battery. Do not use solvents or abrasive cleaners. Ensure no moisture enters the battery housing.

Abbildung 3: Unten view of the Stihl AK20 Lithium-Ion Battery, showing product labels and specifications.
6. Fehlerbehebung
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Akku wird nicht geladen |
|
|
| Akku versorgt Werkzeug nicht mit Strom |
|
|
| LED indicator flashing rapidly |
|
|
7. Spezifikationen
| Besonderheit | Detail |
|---|---|
| Modellname | AK20 |
| Marke | Stihl |
| Akku-Typ | Lithium-Ionen |
| Bandtage | 36 Volt |
| Kapazität | 118 Wh (Wattstunden) |
| Zusammensetzung der Batteriezellen | Lithium-Ionen |
| Wiederverwendbarkeit | Wiederaufladbar |
| Kompatible Ladegeräte | AL 101, AL 100, AL 300, AL 500 |
| LED-Anzeige | Yes, charge level indicator |
| Artikelgewicht | 1.2 Kilogramm |
| Artikelabmessungen (LxBxH) | 3.94 x 3.94 x 3.94 Zoll |
| UPC | 886661117789 |
8. Garantie und Support
For information regarding the warranty of your Stihl AK20 Lithium-Ion Battery, please refer to the warranty card included with your purchase or visit the official Stihl website. For technical support, service, or to purchase replacement parts, please contact your authorized Stihl dealer or Stihl customer service directly. Keep your proof of purchase for warranty claims.