How To Jumpstart A Cordless Drill Battery: Quick and Easy Methods

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To jumpstart a cordless drill battery, connect the battery to a compatible charger and allow it to charge fully before use. Are you facing issues with your cordless drill battery?

Is it failing to power up when you need it most? Don’t worry, as we have a solution for you. In this guide, we will explain how to jumpstart a cordless drill battery effectively and get it back to its optimal performance.

A fully charged battery will be essential for your tasks. So, let’s dive into the steps you need to follow to jumpstart your cordless drill battery quickly and easily.

Table of Contents

Understanding The Basics Of Cordless Drill Batteries


Understanding the Basics of Cordless Drill Batteries

Before we delve into the various ways to jumpstart a cordless drill battery, it’s crucial to have a good grasp of the basics of these batteries. Cordless drill batteries have become an essential tool for both professionals and DIY enthusiasts. They provide convenience and portability, allowing you to work without the hassle of tangled cords.

Different Types Of Cordless Drill Batteries

There are several types of cordless drill batteries available in the market today. Understanding the different types can help you make an informed decision when choosing a battery for your cordless drill. Here are a few of the most common types:

Battery TypeFeatures
Nickel-Cadmium (NiCd)– Affordable
– Durable
– Known for their memory effect
Nickel-Metal Hydride (NiMH)– Environmentally friendly
– Higher capacity than NiCd
– Less prone to memory effect
Lithium-ion (Li-ion)– Lightweight
– Long lifespan
– Quick charging

The Common Reasons For Battery Failure

Despite their benefits, cordless drill batteries can experience failures for various reasons. Here are some common culprits behind battery failure:

  1. Over-discharge: Allowing the battery to fully discharge can cause irreversible damage.
  2. Excessive heat: High temperatures can diminish battery performance and shorten its lifespan.
  3. Age and wear: Like any other electronic device, cordless drill batteries degrade over time and with continuous use.
  4. Poor maintenance: Failing to properly care for and store the battery can lead to premature failure.
How to Revive a Dead Cordless Drill Battery


Assessing The Condition Of A Dead Cordless Drill Battery

If your cordless drill battery seems to have lost its spark, it’s important to assess its condition before jumping to conclusions. There are several signs that can indicate a dead battery, as well as different possible causes for the battery failure. By understanding these signs and determining the cause, you can take the necessary steps to jumpstart your cordless drill battery effectively.

Signs Of A Dead Battery

Before attempting to jumpstart your cordless drill battery, it’s crucial to confirm that the battery is indeed dead. Here are a few key signs that indicate your battery may have lost its charge:

  1. The drill does not start or struggles to turn on, even after charging it for an extended period.
  2. The battery indicator on your drill shows little to no charge left.
  3. The battery does not last as long as it used to, with significantly reduced run time.

If you’re experiencing one or more of these signs, it’s highly likely that your cordless drill battery is in need of a jumpstart.

Determining The Cause Of Battery Failure

A dead battery can result from various factors, so it’s important to determine the cause in order to address the issue effectively. Here are some common causes of cordless drill battery failure:

OverchargingStop leaving the battery plugged in for extended periods and unplug it once fully charged.
UnderchargingEnsure that you charge the battery fully according to the manufacturer’s instructions.
Aging or worn-out batteryConsider replacing the battery with a new one.
Extreme temperature exposureAvoid exposing the battery to excessively hot or cold conditions.
Physical damageInspect the battery for any signs of damage and replace it if necessary.

By identifying the cause of the battery failure, you can take appropriate measures to either revive the battery or replace it with a new one.

Quick Methods To Revive A Dead Cordless Drill Battery

In this blog post, we will explore quick methods to revive a dead cordless drill battery. When your cordless drill battery dies in the middle of a project, it can be frustrating and time-consuming to find a replacement. However, there are simple and effective ways to jumpstart your battery and get back to work. Let’s dive in and discover these quick methods.

Method 1: Cleaning The Battery Terminals

One common reason for a dead cordless drill battery is dirty or corroded terminals. Cleaning the battery terminals is a quick and easy way to revive your battery. Here’s how to do it:

  • Start by disconnecting the battery from the drill or charger.
  • Inspect the battery terminals for any signs of corrosion or dirt buildup.
  • Use a small brush or toothbrush to gently scrub the terminals and remove any dirt or corrosion.
  • Wipe the terminals with a clean cloth to ensure they are dry and free from debris.
  • Reconnect the battery to the drill or charger and test if it has been revived.

Method 2: Jumpstarting The Battery With A Car Charger

If cleaning the battery terminals didn’t work, you can try jumpstarting the battery with a car charger. Here’s how:

  1. Disconnect the dead battery from the drill or charger.
  2. Connect the positive (+) cable of the car charger to the positive terminal of the battery.
  3. Connect the negative (-) cable of the car charger to the negative terminal of the battery.
  4. Set the car charger to a low or slow charging setting.
  5. Leave the battery connected to the car charger for about 10-15 minutes.
  6. Disconnect the car charger and reconnect the battery to the drill or charger.
  7. Test if the battery has been jumpstarted and is functioning properly.

Method 3: Freezing The Battery To Restore Its Capacity

Freezing the battery may seem like an unconventional method, but it can sometimes restore its capacity. Here’s what you need to do:

  1. Remove the battery from the drill or charger.
  2. Place the battery in a sealable plastic bag.
  3. Put the bag with the battery in the freezer and leave it overnight.
  4. Remove the battery from the freezer and let it come back to room temperature.
  5. Reconnect the battery to the drill or charger.
  6. Test if the battery has regained its capacity and can be used.

These quick methods can potentially revive a dead cordless drill battery and save you the time and money of buying a new one. Give them a try and get back to your DIY projects without any interruptions.

Easy Methods To Revive A Dead Cordless Drill Battery

Is your cordless drill battery not holding a charge? Don’t worry, as in this article, we will explore easy methods to revive a dead cordless drill battery. Before you consider replacing the battery altogether, try these simple techniques to get your drill up and running again!

Method 1: Using A Voltage Resetter

If your cordless drill battery is completely dead, using a voltage resetter can be an effective solution. This method works by discharging the battery completely and recharging it from scratch, enabling it to regain its full capacity.

Here’s how to use a voltage resetter:

  1. Connect the voltage resetter to the battery terminals.
  2. Wait for the voltage resetter to discharge the battery fully.
  3. Once the battery is completely discharged, remove the voltage resetter.
  4. Now, use the original charger to recharge the battery. Make sure to follow the manufacturer’s instructions for charging time and procedure.

Method 2: Reviving The Battery With Epsom Salt

Another effective method to revive a dead cordless drill battery is by using Epsom salt. Epsom salt, also known as magnesium sulfate, can help rejuvenate the battery cells and enhance its performance.

Follow these steps to revive the battery with Epsom salt:

  1. Prepare a mixture of Epsom salt and distilled water. The general ratio is 1 tablespoon of Epsom salt for every 1 cup of distilled water.
  2. Remove the battery from the cordless drill.
  3. Submerge the battery in the Epsom salt mixture, ensuring all the battery cells are fully covered.
  4. Let the battery soak in the mixture for at least 24 hours.
  5. After 24 hours, remove the battery from the mixture and wipe it dry.
  6. Put the battery back into the cordless drill and check if it has regained its power.

Method 3: Reconditioning The Battery With A Charger

If your cordless drill battery is not completely dead but experiencing reduced performance, reconditioning it with a charger might be the ideal solution. This method helps remove the sulfation buildup on the battery plates, which is often the cause of diminished performance.

Follow these steps to recondition the battery with a charger:

  1. Connect the battery to the charger.
  2. Select the reconditioning mode on the charger, if available.
  3. Allow the charger to run the reconditioning cycle. The duration may vary depending on the charger model and the battery condition.
  4. Once the reconditioning cycle is complete, disconnect the battery from the charger.
  5. Reinstall the battery in the cordless drill and test its performance.

By following these easy methods, you can potentially revive a dead cordless drill battery without spending money on a new one. Give them a try and see if your battery springs back to life!

How do you bring a cordless drill battery back to life?

If your cordless drill battery isn’t holding a charge or seems to have died, it might be possible to revive it. Here are some methods you can try:

Jump-Starting the Battery:

    • Li-Ion or NiMH Battery: Connect a good battery of the same type to the dead battery, ensuring positive connects to positive and negative to negative, using jumper cables or wires. This can give the dead battery a quick boost.
    • NiCd Battery: Place the dead battery into the charger and allow it to charge for a few minutes. Remove it from the charger, then hit the positive terminal with a quick burst from a 12V source (like a car battery). This can help break down the crystal dendrites that form inside.

Freeze the Battery:

    • Place the battery in a sealed plastic bag and put it in the freezer for 12-24 hours.
    • After freezing, let the battery come back to room temperature.
    • Then, put the battery on the charger and try charging it. Sometimes the cold can help break down internal shorts within the battery.

Cycle the Battery:

    • Fully charge the battery, then use it in your drill until it completely discharges.
    • Repeat this process several times. This might help reset the battery’s memory effect, especially for older NiCd batteries.

Clean the Contacts:

    • Dirty contacts can prevent proper charging. Clean the battery terminals and the charger’s contacts using a cloth or an eraser.

Check the Charger:

    • If you have multiple batteries that aren’t charging, it might be the charger and not the batteries. If possible, test with another charger or use a multimeter to see if the charger is outputting the correct voltage.

Replace the Cells:

    • If all else fails and you’re comfortable with DIY electronics, you can replace the dead cells within the battery pack. Ensure you buy the correct type and size of cells, and solder them correctly in the same configuration. Be cautious, as mishandling batteries can result in injury.

Safety Precautions:

  • Always wear protective gloves and safety goggles.
  • Work in a well-ventilated area away from flammable materials.
  • Never attempt to open, puncture, or physically modify a lithium-ion battery, as it can be dangerous.
  • Always dispose of batteries according to local regulations. Some areas might have recycling programs or designated disposal sites.

Note that the effectiveness of these methods can vary depending on the battery’s age, usage, and specific issues. In some cases, the best option might be to purchase a new battery.

How To Shock A Battery Back To Life

“Shocking” a battery back to life refers to the process of trying to rejuvenate a dead or underperforming battery. This method may work in some situations, but it comes with potential risks and is not guaranteed. The effectiveness largely depends on the type and condition of the battery.

Before trying any method, make sure:

  1. You know the type of battery you are dealing with.
  2. You take proper safety precautions (wear gloves, eye protection, and work in a well-ventilated area).
  3. The battery isn’t physically damaged or swollen.

Here’s a general guide for two common types of batteries:

Lead-Acid (Car Batteries):

    • Ensure the battery terminals are clean.
    • Connect a known good battery in parallel with the dead battery using jumper cables.
      • Connect positive to positive (+ to +) and negative to negative (- to -).
    • Allow the good battery to charge the dead battery for several minutes.
    • Try starting the vehicle or using a battery charger to further charge the battery.
    • If the battery doesn’t accept the charge or the vehicle doesn’t start, it may be beyond repair.

Nickel-Cadmium (NiCd) and some older Nickel-Metal Hydride (NiMH) Batteries:

    • These are often rechargeable AA, AAA, C, D, and 9V batteries.
    • Use a high-current source (like a 12V car battery charger) set to a low amperage.
    • Connect the positive of the charger to the positive of the battery and vice-versa.
    • Pulse the connection several times for a few seconds each. This means connecting and disconnecting quickly.
    • Monitor the battery’s temperature. If it gets hot, disconnect immediately.
    • After trying the “shock” method, attempt to charge the battery normally with its intended charger.


  1. “Shocking” a battery, especially in a non-standard way, is potentially hazardous. Overcharging or providing excessive current can cause batteries to leak, rupture, or even explode.
  2. Lithium-ion and Lithium-polymer batteries should NOT be shocked in this way. Mishandling can result in fire or explosion.
  3. Always read and follow the manufacturer’s instructions. If the battery is under warranty, consult the manufacturer or a professional.

If a battery is repeatedly failing or not holding a charge, it’s often best to recycle it and replace it with a new one.

How To Jumpstart A Dead Lithium-Ion Battery

Jumpstarting a dead lithium-ion battery can be risky and isn’t generally recommended. Lithium-ion batteries can become unstable when improperly handled, which can lead to fires, explosions, or the release of toxic fumes. However, if you’re determined to try and recover a dead lithium-ion battery, here are some guidelines. This process should be carried out only by those who are familiar with battery safety:

Safety Precautions:

    • Work in a well-ventilated area.
    • Use gloves and protective eyewear.
    • Have a fire extinguisher nearby.
    • Keep away from flammable materials.

Check the Voltage:

    • Using a multimeter, check the voltage of the battery. If it’s close to 0 volts, the battery might be beyond recovery.

Use a Good Battery:

    • If the dead battery’s voltage is not at 0, you can use another, healthy lithium-ion battery of the same voltage.
    • Connect the positive terminal of the good battery to the positive terminal of the dead battery, and the negative to the negative using good-quality wires.
    • Keep the batteries connected for a few minutes to allow some charge to flow to the dead battery. Be cautious and monitor the process to ensure there’s no overheating or other issues.

Charger Method:

    • Some users have reported success using a NiMH battery charger to provide a slow trickle charge to the dead Li-ion battery for a short period, just enough to bring it back to life. But be very careful with this method as it can be risky.
    • If the voltage rises to a safe level, you can then transfer the battery to its appropriate lithium-ion charger.

Regular Charging:

    • After trying the above steps, attempt to charge the battery with its appropriate charger. If the battery accepts a charge and holds it, it may be usable. However, be cautious and monitor the battery for any signs of swelling, heating, or other abnormalities.

Test the Battery:

    • If the battery charges successfully, test it on the device it’s intended for. Monitor its performance, any unusual heat, or other anomalies.

Recycle If Needed:

    • If the battery doesn’t accept a charge, or you’re uncertain about its stability, it’s safer to recycle it and replace it with a new one.

Remember: Always prioritize safety. If you’re unsure about any step or procedure, it’s best to consult with a professional or consider recycling the battery and getting a replacement.

How To Fix A Lithium Ion Battery That Won’t Charge

If a lithium-ion battery won’t charge, there can be multiple reasons for this, such as the charger malfunctioning, the battery itself being faulty, or issues with the device’s power management system. However, please be advised that working with lithium-ion batteries can be dangerous, as they can catch fire or explode if mistreated. Always take proper safety precautions.

Here’s a step-by-step troubleshooting guide to help you diagnose and potentially fix a lithium-ion battery that won’t charge:

Safety First:

    • Always work in a well-ventilated area.
    • Wear protective gloves and safety glasses.
    • Avoid puncturing, bending, or heating the battery.

Inspect the Charger and Cables:

    • Ensure the charger and cables are not damaged. Look for fraying, bent connectors, or other visible damages.
    • Try using another charger and cable known to be in working condition.

Check the Power Outlet:

    • Ensure the power outlet you’re using is functional. Plug another device into the outlet to check.

Inspect the Battery and Device:

    • If the battery is removable, take it out and inspect it for any signs of swelling, leakage, or deformation.
    • Clean the battery contacts and the contacts in the device with a clean, dry cloth. Ensure there’s no dirt or corrosion.

Attempt a Soft Reset or Restart:

    • For some devices, a simple reset or restart might fix charging issues.

Try Another Battery:

    • If possible, replace the problematic battery with another one that you know is in good working condition.

Check the Device’s Power Management System:

    • Some devices have power management software that can sometimes malfunction. A software update or a factory reset might resolve such issues.

Deep Discharge Reset:

    • Some lithium-ion batteries can benefit from a deep discharge reset. Discharge the battery completely until the device turns off. Then, charge it uninterrupted to 100%. However, note that fully discharging a lithium-ion battery repeatedly can decrease its lifespan.

Avoid “Jump Starting”:

    • Some online resources might suggest “jump starting” a lithium-ion battery with another power source. This can be risky and could result in fire or explosion. It’s best to avoid such methods.

Professional Help:

  • If the above steps do not resolve the issue, it’s recommended to seek professional help. Visit an authorized service center or consult a professional who specializes in batteries.

Consider Replacement:

  • If the battery is old, it may have reached the end of its life cycle. In such cases, the best solution is to replace the battery.

Remember, if you’re unsure about any step or if the battery appears damaged, it’s always safer to consult with a professional or replace the battery rather than attempting to fix it yourself.

How To Bring A Dead Rechargeable Battery Back To Life

Reviving a dead rechargeable battery depends on the type of battery and the reason for its degradation. Safety is paramount when working with batteries. Always use protective gear like gloves and safety glasses. Here are some general steps for different types of rechargeable batteries:

Nickel-Cadmium (NiCd) & Nickel-Metal Hydride (NiMH) Batteries:

    • Zapping: Dead NiCd batteries can sometimes be rejuvenated by using a quick and high-current pulse. This method, however, has potential risks, including overheating or explosion.
    • Refreshing: Discharge the battery completely, then recharge slowly. Repeating this process several times might help restore the battery’s capacity.

Lithium-ion (Li-ion) Batteries:

    • Zero Voltage Recovery: Some Li-ion batteries can go into a “deep discharge” mode where the voltage is so low that the charger doesn’t recognize it. Using a different Li-ion charger with a boost function or a universal charger can sometimes revive these cells.
    • Balancing Cells: If the battery pack, like those in laptops, has multiple cells, one dead cell can prevent charging. Disassembling the pack and charging the individual cells can sometimes remedy this. But, this method can be very dangerous if not done correctly.

Lead-Acid Batteries (like car batteries):

    • Distilled Water: If the battery is not sealed, you can top up the cells with distilled water (not tap water), then charge the battery.
    • Desulfation: Over time, sulfate crystals form on the battery’s plates. Desulfators can reverse this process. These devices send electrical pulses through the battery, breaking down the crystals.

General Methods:

    • Freezing: Some people claim that placing a battery in the freezer overnight and then letting it come to room temperature can help. While there are anecdotal success stories, this method is not universally accepted and can pose risks, especially with lithium-based batteries.
    • Changing Chargers: Sometimes the problem isn’t with the battery but with the charger. Trying a different charger might help.


  1. Never short-circuit a battery as this can cause an explosion or fire.
  2. When working with a battery, work in a well-ventilated area, away from open flames or sparks.
  3. Beware of swelling or leakage in lithium batteries, as they can explode or catch fire.
  4. Before attempting to revive a battery, research the battery type and associated risks.

In many cases, if a battery has lost significant capacity or won’t charge, it might be best to recycle it properly and replace it with a new one.

Tips For Maintaining Cordless Drill Batteries

As a responsible cordless drill owner, knowing the tips for maintaining your drill batteries is essential for ensuring their longevity and efficient performance. While it’s tempting to treat your cordless drill as a workhorse and forget about the importance of battery maintenance, following proper storage techniques and regularly caring for your batteries can help extend their lifespan and keep them in optimal condition. In this article, we’ll discuss two crucial aspects of cordless drill battery maintenance: proper storage techniques and regular battery care.

Proper Storage Techniques

Storing your cordless drill batteries correctly is vital to prevent damage and maintain their performance. Here are a few key tips:

  • Keep your batteries in a cool, dry place: Extremes in temperature and exposure to moisture can negatively impact battery performance. Storing them in a cool, dry area helps maintain their optimal condition and prevents corrosion.
  • Avoid leaving batteries in extreme temperatures: Exposing your batteries to extreme cold or heat can cause permanent damage. If you’re working in extreme weather conditions, it’s best to remove the battery and store it separately.
  • Store batteries in a protective case: Investing in a durable and shock-resistant case provides an extra layer of protection against accidental drops or impacts. This helps prevent physical damage and extends the lifespan of your batteries.
  • Regularly inspect batteries for signs of damage: Before storing your batteries, visually inspect them for any signs of physical damage, such as cracks or bulges. If you notice any abnormalities, it’s advisable to replace the battery to prevent potential safety hazards.

Regular Battery Maintenance And Care

Regular maintenance and care are essential for keeping your cordless drill batteries in great condition. Follow these tips to prolong their lifespan:

  • Charge and discharge batteries regularly: To prevent degradation, it’s crucial to avoid leaving your batteries discharged for extended periods. If you’re not using your cordless drill regularly, aim to charge them at least every three months to maintain their health and capacity.
  • Follow the manufacturer’s charging instructions: Each cordless drill model may have specific charging instructions provided by the manufacturer. Adhering to these guidelines can help optimize the charging process, prevent overcharging, and maximize battery life.
  • Remove batteries when not in use: If you won’t be using your cordless drill for an extended period, it’s recommended to remove the battery. This helps prevent self-discharge and extends the overall lifespan of the battery.
  • Keep connections clean and free from debris: Regularly inspect the battery contacts on both the drill and the battery itself. Use a clean, dry cloth to remove any dust or debris that may accumulate. Clean connections ensure optimal electrical connectivity and efficient power transfer.
  • Avoid full discharge before recharging: It’s best to avoid running your batteries until they are completely discharged before recharging. Partial discharges and regular recharging can help maintain battery health and prevent capacity loss.

By following these storage techniques and regularly maintaining and caring for your cordless drill batteries, you can ensure they remain in excellent condition and provide you with reliable power for your projects. Remember, proper storage and maintenance not only extend the lifespan of your batteries but also contribute to the overall efficiency and performance of your cordless drill.

Frequently Asked Questions Of How To Jumpstart A Cordless Drill Battery

How Do You Jumpstart A Cordless Drill Battery?

To jumpstart a cordless drill battery, you need to connect the battery charger to the battery terminals and let it charge for a few minutes. Once the battery has enough charge, remove the charger and connect the battery to the drill.

Your cordless drill should now be ready to use!

Can You Jumpstart A Dead Cordless Drill Battery?

Yes, you can jumpstart a dead cordless drill battery. Simply connect the battery charger to the battery terminals and let it charge for a while. If the battery is completely dead, it may take longer to charge. Once the battery has enough charge, remove the charger and connect the battery to the drill.

What If My Cordless Drill Battery Doesn’t Hold A Charge?

If your cordless drill battery doesn’t hold a charge, it may be time to replace it. Over time, batteries can lose their ability to hold a charge effectively. Before purchasing a new battery, make sure to check the manufacturer’s warranty and consider reaching out to their customer support for troubleshooting or replacement options.

What does it mean to “jumpstart” a drill battery?

Jumpstarting a battery typically refers to the process of temporarily boosting the voltage of a battery that’s too discharged to charge normally, allowing it to accept a charge again.

Why would a drill battery need to be jumpstarted?

Over time and with disuse, a cordless drill battery can become so discharged that the charger may not recognize it. Jumpstarting can help bring it back to a state where it can be charged properly.

Is it safe to jumpstart a drill battery?

It can be dangerous if not done correctly. Always follow safety guidelines and never try to jumpstart a battery that’s damaged or leaking. If in doubt, consult an expert or consider buying a new battery.

What do I need to jumpstart my drill battery?

Typically, you’ll need:

  • A good battery of the same voltage as the dead one.
  • Two jumper wires with alligator clips.
  • Safety equipment, like gloves and safety glasses.

How do I jumpstart the battery?

Here’s a basic procedure: a. Connect the positive (often red) terminal of the good battery to the positive terminal of the dead battery. b. Do the same with the negative terminals. c. Leave the batteries connected for a few minutes. d. Disconnect the batteries. e. Try charging the dead battery as you normally would.

How long should I leave the batteries connected?

Usually, a few minutes is enough. However, don’t leave them connected for extended periods as this can cause damage.

My battery is really old. Should I jumpstart it?

If the battery has been unused for years, it’s often best to replace it. Older batteries can be more prone to failure or can have a significantly reduced capacity.

Can I use a car battery charger to jumpstart my drill battery?

No, car battery chargers are designed for 12V lead-acid batteries. Using them on a cordless drill battery can cause serious damage or injury.

My battery doesn’t seem to hold a charge after jumpstarting. What should I do?

If after jumpstarting, your battery doesn’t hold a charge or the capacity is significantly reduced, it might be time for a replacement. Over time, batteries degrade and eventually need to be replaced.

Can I jumpstart any type of cordless drill battery?

While the basic principle can apply to many batteries, always check the manufacturer’s guidelines and consult the battery type. Some batteries, like Lithium-ion (Li-ion), require special care.

Always prioritize safety. If you’re uncertain about any part of the process, seek expert advice or consider purchasing a new battery.


To sum up, reviving a cordless drill battery is a simple and cost-effective process that can save you time and money. By following the steps outlined you can jumpstart your battery safely and efficiently. Remember to properly maintain your battery to prolong its lifespan and maximize its performance.

With these tips, you’ll be able to tackle any project with a fully charged cordless drill.