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How To Fix Dewalt Lithium Ion Battery Not Charging

Facing a Dewalt lithium-ion battery that refuses to charge can be a frustrating setback, especially when you depend on your tools for work or projects. The reasons behind this issue can be varied, from simple fixes to more complex technical troubleshooting.

Understanding the potential causes and solutions is crucial to ensure your battery functions optimally. Let's explore some practical steps and strategies to address the challenge of a Dewalt lithium-ion battery not charging, empowering you to regain the full potential of your power tools.

Key Takeaways

  • Check battery connections and cleanliness for proper charging.
  • Use compatible charger and monitor charging rates for abnormalities.
  • Consider battery resetting or deep discharge per manufacturer guidelines.
  • Ensure safe charging practices and proper battery maintenance for longevity.

Check the Battery Connections

To ensure proper charging of your Dewalt lithium-ion battery, it is essential to carefully inspect and verify the connections between the battery and the charger. Start by ensuring that the positive and negative terminals are correctly connected to both the charger and the battery. A secure connection is crucial for the charging process to function effectively. Check for any corrosion or debris on the battery terminals that may obstruct the charging process. Clean any build-up carefully to ensure optimal contact and charging efficiency.

Additionally, make sure that the charger is properly plugged in and functioning to deliver power to the battery. A faulty charger can prevent the battery from reaching a fully charged state. Verify that the charger is compatible with the Dewalt lithium-ion battery to avoid any charging issues. Using an incompatible charger can lead to incomplete or ineffective charging, resulting in a battery that does not reach its full capacity. By inspecting and addressing these key factors related to the battery connections, you can troubleshoot and resolve charging issues effectively.

Inspect for Physical Damage

Inspecting for physical damage on your Dewalt lithium-ion battery is crucial to identifying any potential issues that may affect its charging functionality. Look for visible signs of damage such as cracks, dents, or leaks on the battery casing.

Ensure that the battery contacts are clean and free of corrosion or debris that could impede the charging process. Additionally, inspect the battery terminals for any bending, warping, or disconnection that might hinder a proper connection with the charger.

It is important to examine the battery pack for any bulging or swelling, as these could indicate internal damage or malfunction. Be mindful of the battery's exposure to extreme temperatures or conditions that could impact its performance and charging capabilities.

Clean the Battery Terminals

Efficient maintenance of your Dewalt lithium-ion battery involves ensuring that the battery terminals are kept clean and free of debris that could impede proper electrical contact.

Cleaning the terminals is essential to remove dirt, dust, and corrosion that may accumulate over time. Using a soft brush or cloth, gently clean the terminals to avoid causing any damage.

It is crucial to ensure that the terminals are completely dry before attempting to charge the battery again to prevent any electrical issues.

Regularly cleaning the terminals not only resolves current charging issues but also helps prevent future problems, ultimately extending the battery's lifespan.

This simple yet effective maintenance step can significantly improve the charging efficiency of your Dewalt lithium-ion battery, ensuring optimal performance when powering your tools.

Reset the Battery

Resetting a Dewalt lithium-ion battery can be achieved by connecting it to a fully charged battery using speaker wire. This method jumpstarts the charging cycle and helps the charger recognize the depleted battery. By transferring power for a brief period, the battery is reset and ready to be charged normally.

This approach is particularly useful for batteries that have been left unused for an extended period or those that appear completely discharged. It is important to follow safety precautions and ensure a secure connection during the battery resetting process to prevent any accidents or damage.

Use a Compatible Charger

To ensure efficient and safe charging of your Dewalt lithium-ion battery, always use a compatible charger specifically designed for your battery model. Using an incompatible charger can not only damage the battery but also prevent it from charging properly. Check the charger's compatibility with your Dewalt lithium-ion battery to avoid any charging issues. By using the correct charger, you can optimize the charging process and prolong the battery's lifespan. Remember to always refer to the user manual or Dewalt's official website to find the appropriate charger for your specific battery.

  • Using the wrong charger can harm the battery.
  • Ensure the charger is compatible with your Dewalt lithium-ion battery.
  • Optimize the charging process by using the correct charger.
  • Prolong the battery's lifespan with a compatible charger.
  • Consult the user manual or Dewalt's official website for the right charger model.

Test the Charger

Using a compatible charger is crucial for ensuring the proper functioning of your Dewalt lithium-ion battery; now, moving on to the next step, test the charger to troubleshoot any potential issues.

Start by checking if the charger is plugged in and receiving power. Inspect the charger for any visible damage or debris that may be affecting its performance. To further diagnose the charger, try using it with a different compatible battery to verify its functionality. Additionally, you can use a multimeter to measure the output voltage of the charger and see if it is within the expected range.

If, after these steps, the charger still does not work with a known good battery, it is advisable to contact Dewalt customer support for further assistance. Proper charger functionality is essential for charging your Dewalt lithium-ion battery effectively, so ensuring the charger is working correctly is a crucial troubleshooting step.

Perform a Deep Discharge

Performing a deep discharge on a Dewalt lithium-ion battery is a method that involves fully depleting the battery until it no longer powers the tool. This process helps reset the battery's internal circuitry and can potentially revive it from a state where it won't charge. However, deep discharging should only be done occasionally as a last resort measure, as frequent deep discharges can harm the battery's overall lifespan. It is crucial to follow manufacturer guidelines and safety precautions when deep discharging lithium-ion batteries to avoid any potential hazards. After performing a deep discharge, allow the battery to rest for a while before attempting to recharge it to prevent overheating or other issues.

  • Fully deplete the battery until it no longer powers the tool.
  • Reset the battery's internal circuitry.
  • Deep discharge should be an occasional last resort.
  • Follow manufacturer guidelines and safety precautions.
  • Allow the battery to rest before recharging.

Consider a Firmware Update

Consideration of a firmware update for Dewalt lithium-ion batteries may help resolve charging issues and enhance overall battery performance. Firmware updates are designed to address specific issues within the battery management system, which can impact the charging functionality and overall performance of the battery.

To initiate a firmware update for your Dewalt lithium-ion battery, it is recommended to visit Dewalt's official website and locate the firmware update instructions and downloads section. Following the step-by-step guide provided by Dewalt is crucial to ensure a successful firmware update process.

By updating the firmware, you may potentially fix the battery not charging issue and experience improved efficiency when using your Dewalt lithium-ion battery. Stay informed about any available firmware updates from Dewalt to keep your battery operating at its best and to maximize its lifespan.

Remember to follow all guidelines and precautions provided during the firmware update process to avoid any potential risks.

Contact Dewalt Customer Support

For assistance with a Dewalt lithium-ion battery not charging, reaching out to Dewalt's customer support can provide valuable troubleshooting steps and guidance. Dewalt's customer support team is equipped to handle queries related to battery issues, offering expertise in diagnosing and resolving charging problems. By contacting Dewalt's customer support, users can benefit from the following:

  • Troubleshooting steps tailored to address the specific non-charging issue.
  • Assessment to determine if the battery requires replacement or can be repaired.
  • Guidance on resetting the lithium-ion battery to facilitate charging functionality.
  • Assistance in identifying any applicable warranty coverage for the battery concern.
  • Specific instructions based on the model of the lithium-ion battery in question.

Frequently Asked Questions

How Do You Fix a Lithium Ion Battery That Won't Charge?

To resolve a lithium-ion battery that won't charge, consider jump-starting it with a fully charged battery using speaker wire. Connect the positive terminals first, then the negative ones briefly to transfer power, potentially resetting the faulty battery for proper charging.

How Do You Reset a Lithium Battery?

Resetting a lithium battery involves connecting a fully charged battery's positive and negative terminals to the corresponding terminals of the dead battery. This process jumpstarts the charging, preventing damage from complete discharge and reviving unresponsive batteries.

How Do I Bring My Dewalt Battery Back to Life?

To revive a Dewalt lithium-ion battery, jumpstart it with a fully charged battery using speaker wire. Reset the dead battery to be recognized by the charger, preventing complete discharge damage. Monitor the process for success.

How Do You Wake up a Lithium Ion Battery?

To wake up a lithium-ion battery, connect it to a fully charged battery with speaker wire. Connect positive terminals first, then negative. Transfer power briefly to kickstart charging. This technique revives dead batteries, akin to jumpstarting a car.


In conclusion, addressing a Dewalt lithium-ion battery not charging issue requires thorough inspection, cleaning, resetting, and testing of connections and chargers.

Performing a deep discharge and considering firmware updates can also help resolve the issue.

If all else fails, contacting Dewalt customer support for further assistance is recommended.

Following these steps diligently can help restore the battery to a functional state and prevent potential damage from complete discharge.

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Alex Mitchell
Alex Mitchell

Alex Dockman is an IT Systems Engineer and tech enthusiast with a knack for making complex technology topics understandable. With a background in Computer Science and hands-on experience in Silicon Valley, he shares his insights on docking stations and connectivity solutions, helping readers navigate the tech world. Alex's writing is known for its clarity and precision, making technology accessible to all.

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