1. Introduction
This manual provides essential information for the safe and effective use of your AEG PRO18V 2.0Ah Lithium-Ion Battery, model L1820S. This battery is designed to power AEG PRO18V compatible tools, offering a lightweight and compact power solution with advanced protection features.
The AEG PRO18V battery system features Pro Lithium-Ion™ technology, which includes triple protection mechanisms: temperature monitoring, electronic overload protection, and unique cell monitoring to prevent deep discharge. These features ensure optimal performance and extended battery life.
2. Safety Information
Always observe the following safety precautions when handling and using your battery:
- Read all instructions: Before using the battery, read this instruction manual and any manuals for the tool it will power.
- Charging: Only use chargers specified by AEG for this battery. Using an incompatible charger may create a risk of fire.
- Avoid short-circuiting: Do not short-circuit the battery terminals. Keep the battery away from metal objects like keys, coins, paper clips, or other small metal objects that can make a connection from one terminal to another.
- Do not open: Never attempt to open the battery pack. There are no user-serviceable parts inside.
- Protect from heat: Do not expose the battery to heat or fire. Avoid direct sunlight.
- Protect from moisture: Do not expose the battery to rain or wet conditions.
- Damage: Do not use a damaged or modified battery pack. Damaged batteries may exhibit unpredictable behavior resulting in fire, explosion, or risk of injury.
- Disposal: Dispose of batteries responsibly according to local regulations. Do not dispose of batteries in household waste or by incineration.
3. Setup
3.1 Initial Charge
Before first use, fully charge the battery. Refer to your AEG battery charger's instruction manual for specific charging procedures.

Image: The AEG PRO18V 2.0Ah Lithium-Ion battery L1820S being charged in an AEG battery charger. The charger has indicator lights to show charging status.
3.2 Attaching to a Tool
- Align the battery with the battery port on your compatible AEG PRO18V tool.
- Slide the battery firmly into the tool until it clicks into place. Ensure it is securely latched.
4. Operating
4.1 Battery Charge Indicator
The L1820S battery features a 4-LED charge level indicator. Press the button on the battery to display the current charge level:
- 4 LEDs: 75-100% charge
- 3 LEDs: 50-75% charge
- 2 LEDs: 25-50% charge
- 1 LED: Below 25% charge, recharge soon

Image: The AEG PRO18V 2.0Ah Lithium-Ion battery L1820S, highlighting the location of the charge indicator button and LED lights.
4.2 Using with Tools
Once attached, the battery powers your AEG PRO18V tool. The battery's intelligent system monitors temperature and prevents overload, ensuring safe operation and protecting both the battery and the tool.

Image: A graphic illustrating the compatibility of the AEG PRO18V battery with a wide range of AEG tools, emphasizing the 'one battery for all' concept.
5. Maintenance
5.1 Cleaning
Keep the battery terminals clean and free of debris. Use a dry cloth to wipe the battery exterior. Do not use liquids or abrasive cleaners.
5.2 Storage
Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures. For long-term storage, it is recommended to store the battery with a partial charge (around 50%). Avoid storing fully discharged batteries for extended periods.
5.3 Battery Life
The unique cell monitoring technology ensures individual cells are charged and discharged optimally, contributing to a longer overall battery life and consistent performance.
6. Troubleshooting
- Battery not charging:
- Ensure the charger is properly plugged into a working power outlet.
- Verify the battery is correctly seated in the charger.
- Check for any visible damage to the battery or charger. Do not use if damaged.
- Ensure the ambient temperature is within the recommended charging range (typically 0°C to 40°C).
- Battery not powering tool:
- Check the battery charge level using the indicator. Recharge if necessary.
- Ensure the battery is securely attached to the tool.
- Check for any visible damage to the battery or tool terminals.
- If the tool has an overload protection feature, it might have been triggered. Allow the tool to cool down.
- Battery overheating during use:
- The battery has built-in thermal protection. If it overheats, it will automatically shut down. Allow the battery to cool down before resuming use.
- Avoid continuous heavy-duty applications that may cause excessive heat buildup.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | AEG |
| Model Number | L1820S |
| Voltage | 18 Volts |
| Battery Capacity | 2.0 Ah |
| Battery Composition | Lithium-Ion |
| Weight | 0.42 kg |
| Dimensions (L x W x H) | 18.4 x 8.5 x 16.8 cm |
| Reusability | Rechargeable |
| Recommended Use | Power Tool |
8. Warranty and Support
8.1 Warranty Information
AEG batteries are covered by a 3-year warranty. This includes an initial 24-month warranty, which can be extended by an additional 1 year if the product is registered online within 30 days of purchase. Please retain your proof of purchase for warranty claims.

Image: A graphic detailing AEG's warranty policy, including 3 years for batteries upon online registration.
8.2 Customer Support
For further assistance, technical support, or warranty claims, please visit the official AEG website or contact your local AEG service center. Contact information can typically be found on the product packaging or the AEG brand website.





