1. Introdución
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. Información de seguridade
Always observe the following safety precautions to prevent injury and damage to the battery or connected equipment.
- Le todas as instrucións: Before using the battery, read all instructions and cautionary markings on the battery, the charger, and the product using the battery.
- Cargando: 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.
- Evite curtocircuítos: Do not short-circuit the battery terminals. This can cause severe burns or fire.
- Temperatura: 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.
- Exposición á auga: Do not expose the battery to water or rain. If the battery becomes wet, do not use it.
- Danos: Do not use a damaged or modified battery. Damaged batteries may exhibit unpredictable behavior resulting in fire, explosion, or risk of injury.
- Eliminación: Dispose of batteries responsibly according to local regulations. Do not dispose of batteries in fire.
- Nenos: Manteña as pilas fóra do alcance dos nenos.
3. Configuración
3.1 Desembalaxe
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.

Figura 1: Fronte view of the Stihl AK20 Lithium-Ion Battery, showing the Stihl logo and LED charge indicator.
3.2 Carga inicial
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 Inserción da batería nunha ferramenta
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.

Figura 2: Arriba view of the Stihl AK20 Lithium-Ion Battery, showing the connection terminals and warning labels.
4. Funcionamento da batería
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 LED: Carga completa
- 3 LED: Carga aproximada do 75 %
- 2 LED: Carga aproximada do 50 %
- 1 LED: Carga baixa, recárguea pronto
- LED intermitente: Battery is critically low or has an error.
4.2 Uso con ferramentas compatibles
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. Mantemento
5.1 Procedementos de carga
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 Almacenamento
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 Limpeza
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.

Figura 3: Abaixo view of the Stihl AK20 Lithium-Ion Battery, showing product labels and specifications.
6 Solución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| A batería non se está cargando |
|
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| A batería non alimenta a ferramenta |
|
|
| LED indicator flashing rapidly |
|
|
7. Especificacións
| Característica | Detalle |
|---|---|
| Nome do modelo | AK20 |
| Marca | Stihl |
| Tipo de batería | Litio-Ion |
| Voltage | 36 voltios |
| Capacidade | 118 Wh (Watt-hours) |
| Composición da pila da batería | Ion de litio |
| Reutilizabilidade | Recargable |
| Cargadores compatibles | AL 101, AL 100, AL 300, AL 500 |
| Indicador LED | Yes, charge level indicator |
| Peso do elemento | 1.2 quilogramos |
| Dimensións do artigo (LxWxH) | 3.94 x 3.94 x 3.94 polgadas |
| UPC | 886661117789 |
8. Garantía e soporte
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.