DeWalt power tools are renowned for their reliability and performance, largely due to the efficient batteries that power them. However, like any battery, the 20V DeWalt battery can eventually die or show signs of diminished performance. In this guide, we will explore various methods to revive a dead 20V DeWalt battery, ensuring you get the most out of your investment and extending the life of your tools.
Understanding the DeWalt 20V Battery
Before diving into the revival methods, it’s crucial to comprehend how the 20V DeWalt battery functions. The DeWalt 20V battery is a lithium-ion battery, which means it offers several advantages over traditional nickel-cadmium batteries, such as lighter weight, longer life cycles, and minimal memory effect.
The Anatomy of a Lithium-Ion Battery
Lithium-ion batteries consist of several components:
- Positive Electrode (Cathode): Typically made of lithium cobalt oxide.
- Negative Electrode (Anode): Usually composed of graphite.
- Electrolyte: A lithium salt dissolved in an organic solvent.
- Separator: A porous film that prevents contact between the anode and cathode while allowing lithium ions to pass through.
Common Reasons for Battery Failure
Understanding why your battery may have failed is critical in deciding the revival method to use:
- Over-discharge: Using the battery until it is completely dead can lead to irreversible damage.
- Age: Over time, all batteries lose their ability to hold a charge.
- Temperature extremes: Exposure to high temperatures during use or storage can cause batteries to fail prematurely.
Assessing Your Battery’s Condition
Before attempting any revival techniques, it’s essential to evaluate the state of your dead 20V DeWalt battery. This involves a few systematic checks:
Visual Inspection
- Check for Damage: Look for swelling, corrosion, or any physical damage to the battery casing. A compromised case may indicate that the battery is beyond repair.
- Inspect the Contacts: Ensure the battery terminals are clean and free of debris or corrosion.
Electrical Testing
Utilize a multimeter to check the voltage of your battery:
1. A fully charged DeWalt 20V battery should read around 20 volts.
2. If the voltage is significantly lower (below 5 volts), it may indicate a dead battery unable to recover.
Method 1: Jump-Starting the Battery
One of the most effective ways to revive a dead 20V DeWalt battery is by jump-starting it. This method is generally safe and straightforward.
Equipment Needed
- A functional 20V DeWalt battery
- A jumper wire (with alligator clips)
Step-by-Step Instructions
- Position Both Batteries: Place the dead battery and the functional battery close together.
- Connect Jumper Wires:
- Attach one end of the jumper wire to the positive terminal of the functional battery.
- Connect the other end of the wire to the positive terminal of the dead battery.
- Now, connect one end of another jumper wire to the negative terminal of the functional battery.
- Finally, attach the other end to the negative terminal of the dead battery.
- Wait for a Few Minutes: Allow the connection to sit for 5-10 minutes. This process can sometimes transfer a small charge to the dead battery.
- Charge the Dead Battery: Disconnect the jumper wires and immediately place the revived battery in the DeWalt charger to fully charge it.
Method 2: The Freezer Trick
An unconventional yet occasionally effective method to revive a dead battery is using temperature regulation, specifically placing the battery in the freezer.
How This Method Works
Cooling the battery can sometimes help reset its internal components, but it must be combined with charging to work effectively.
Step-by-Step Instructions
- Prepare the Battery: Make sure the battery is completely discharged. Do not place it in the freezer if it’s still holding a charge.
- Seal the Battery: Place the dead battery in a sealed plastic bag to prevent moisture from entering.
- Freezing: Leave the battery in the freezer for at least 12 hours. This process can help in resetting the battery’s circuitry.
- Reviving: After removing from the freezer, let it sit at room temperature for an hour before attempting to charge it.
Method 3: Using a Smart Charger
If the previous methods don’t work, investing in a smart charger may be your next best option. Smart chargers are designed to analyze and modify the charging cycle based on the battery’s condition.
Features of Smart Chargers
- Condition Monitoring: The charger will determine the appropriate charging strategy based on the detected battery condition.
- Multiple Charge Modes: They often have modes for different types of battery issues, such as trickle charge or desulfation.
How to Use a Smart Charger
- Connect the Smart Charger: Attach the charger to the dead battery.
- Select the Mode: Choose a mode that targets the specific issue of your battery.
- Monitor Charging: Watch the charging progress. A smart charger can take several hours to revive a battery, depending on its state.
- Test the Battery: Once charged, check the battery with a multimeter before using it in your tools.
Tips for Preventing Battery Failure
Even the most diligent users can find themselves with a dead battery from time to time. Here are some tips to help prolong the life of your 20V DeWalt battery:
Proper Use and Care
- Avoid Complete Discharges: Try to charge your battery before it drops below 20%.
- Keep It Cool: Store and use the battery in a moderate temperature range.
- Regular Maintenance: Clean the terminals regularly and check for signs of wear.
When to Replace Your Battery
Despite these revival methods, there comes a time when no technique will restore your battery’s original performance. Signs that indicate it may be time for a replacement include:
- Inability to Hold a Charge: If a jump-start or smart charger cannot revive the battery.
- Extreme Physical Damage: Any visible bulging or corrosion.
- Shorter Operation Time: Frequent charge cycles with minimal operational time.
Conclusion
Reviving a dead 20V DeWalt battery can be an empowering process for anyone who relies on these tools for professional or personal use. By understanding the battery’s anatomy, implementing effective revival methods such as jump-starting and using smart chargers, and maintaining best practices for battery care, you can greatly enhance the lifespan of your power tool batteries.
Keep these tips in mind, and you might find that your initial investment continues to pay dividends long after the purchase. With careful attention and a little ingenuity, you can breathe new life into your dead DeWalt battery, ensuring that your tools are always ready for action.
What causes a 20V DeWalt battery to stop working?
The primary cause for a 20V DeWalt battery to stop working is often due to deep discharge. When a battery is not recharged before it completely drains, it can enter a state where it becomes unrecoverable. Factors such as age, temperature fluctuations, and prolonged lack of use can contribute to this issue. In addition, internal cell damage may occur due to excessive heat generated during normal usage or charging cycles.
Another significant factor can be the quality of the charger used. Using a non-compatible charger or a faulty charging device may lead to improper voltage levels, ultimately damaging the battery over time. Regular maintenance, such as ensuring the battery terminals are clean and free from corrosion, can help prevent these issues and prolong the life of your battery.
Can I revive a completely dead DeWalt battery?
Yes, it is possible to revive a completely dead DeWalt battery, though the success rate can vary based on the battery’s condition and age. One common method is to use a jump-starting technique, where a charged battery is connected to the dead one. This method temporarily provides the necessary voltage to kickstart the chemical reactions within the cells. However, it’s essential to follow safety measures and the correct procedure to avoid damaging either battery or causing injury.
Another approach is to perform a slow trickle charge using a compatible charger. This involves charging the dead battery at a low current for an extended period, which can sometimes help restore functionality. Keep in mind that these methods may not always guarantee revival, especially for batteries with extensive internal damage. It’s best to weigh the costs of reviving against purchasing a new battery if the old one is not responding to these techniques.
What tools do I need to attempt a battery revival?
To attempt a battery revival on a dead 20V DeWalt battery, you will need some basic tools for safety and efficiency. A multimeter is essential for checking the battery’s voltage and determining its charge level. Additionally, you may need screwdrivers, wire connectors, and safety gloves to handle the battery properly. Having a reliable charger compatible with DeWalt products is also crucial to avoid further damage during the charging process.
In some cases, more advanced techniques may call for additional tools, such as a soldering iron and heat shrink tubing if you need to replace damaged cells or connections. It’s important to remember that working with batteries can be risky, so ensuring you have the necessary safety gear, such as goggles and gloves, is vital to protecting yourself from any potential hazards.
How long does it take to revive a dead battery?
The time it takes to revive a dead 20V DeWalt battery can vary based on the method used and the battery’s state. If you utilize a jump-start technique, you may only need to charge for a few minutes, but this can differ depending on how deeply the battery has discharged. The more effective method, slow trickle charging, typically requires several hours to a full day, allowing the battery to gradually regain its charge without overwhelming the cells.
In some instances, the revival process could take longer if the battery has significant internal damage or is older. It’s essential to monitor the battery during the revival process and stop if any unusual signs appear, such as swelling or excessive heat. Always be patient with the charging process and avoid rushing to prevent further damage.
Are there any risks associated with reviving a dead battery?
Yes, there are several risks associated with attempting to revive a dead 20V DeWalt battery. One major concern is the potential for the battery to leak or swell as a direct result of faulty cells. This can lead to exposure to hazardous chemicals inside the battery, which could pose health risks. Additionally, there is a risk of fire if the battery is damaged or charged incorrectly, especially when using improper charging methods.
Another consideration is the possibility of short-circuiting, which can occur if wires or connectors are not properly insulated or if the battery terminals are connected incorrectly. This could lead to serious injury and damage to the battery or connected devices. To mitigate these risks, it is crucial to follow safety guidelines, perform the revival in a well-ventilated area, and wear appropriate protective gear.
How can I prevent my DeWalt battery from dying in the future?
To prevent your DeWalt battery from dying in the future, regular maintenance is key. Always store the battery in a cool, dry place and avoid exposing it to extreme temperatures, whether hot or cold. If you’re not using the battery for an extended period, it’s advisable to store it at around 50% charge, as this reduces the strain on the internal cells compared to complete discharge or full charge.
Additionally, try to avoid deep discharging by recharging the battery before it runs low. Regularly inspect the battery for signs of wear, such as cracks or corrosion on the terminals. Using only DeWalt chargers and compatible devices will also ensure optimal performance. Following these steps can significantly extend the lifespan of your DeWalt battery and enhance its reliability for future projects.