How to Revive a Cordless Drill Battery: Tips and Tricks to Extend Battery Life

Has your cordless drill battery lost its power and won’t hold a charge? If so, you’re not alone. It’s frustrating when you have a project to finish, and the battery dies out before you’re done. You may be tempted to buy a new one, but that could be expensive, especially if you have multiple tools that require the same battery.

The good news is that you can revive your cordless drill battery easily and save yourself some money. In this blog post, we’ll discuss some simple steps you can take to bring your dead battery back to life and get your projects back on track. Whether you’re a DIY enthusiast or a professional contractor, reviving your cordless drill battery can save you time, money, and frustration.

So let’s get started!

Understanding Cordless Drill Batteries

If you’ve ever experienced the frustration of a dead cordless drill battery, you know how important it is to have a charged battery on hand when tackling a project. Fortunately, reviving a cordless drill battery is possible with the right tools and techniques. One option is to try jumpstarting the battery by connecting it to a charged battery of the same type.

Another method is to use a specialized battery charger that can break down the sulfate buildup on the battery cells, restoring the battery’s charge capacity. Before attempting to revive your battery, it’s important to identify the type of battery your drill uses, as different types require different charging techniques. With a little knowledge and effort, you can save money and extend the life of your cordless drill batteries.

So, next time you’re faced with a dead battery, don’t throw it away – try reviving it instead!

Types of Cordless Drill Batteries

Cordless drill batteries are an essential component of any DIY or professional handyman’s toolkit. Choosing the right battery for your cordless drill can make all the difference in terms of performance, cost, and usability. There are three types of cordless drill batteries available in the market: nickel-cadmium (NiCad), nickel-metal hydride (NiMH), and lithium-ion (Li-ion).

NiCad batteries were the first rechargeable cordless drill batteries, but they are now considered outdated due to their high toxicity and memory effect, which limits their overall performance. NiMH batteries are an improvement over NiCad batteries, but they still suffer from memory effect and have a shorter lifespan than Li-ion batteries. Finally, Li-ion batteries are the latest and most advanced type of cordless drill batteries, featuring high energy density, fast charging times, and no memory effect.

Although Li-ion batteries are more expensive, they are a worthy investment for anyone looking for optimal performance and longevity from their cordless drill.

how to revive a cordless drill battery

Why Cordless Drill Batteries Die

Cordless drill batteries are one of the most common and convenient power sources for DIY enthusiasts and professionals alike. However, it’s not uncommon for them to suddenly die, leaving you with an unfinished job. So, why do cordless drill batteries die? The answer is simple – battery efficiency decreases over time due to a few factors.

One of the main reasons for this is how often the battery is used. With each charge and discharge cycle, the battery’s capacity decreases, leading to shorter run times. Furthermore, how the battery is stored when not in use also affects its lifespan.

Leaving the battery in extreme temperatures, whether hot or cold, for extended periods can cause its performance to degrade quickly. Another factor is the charging process; charging the battery too often or using the wrong charger can cause it to wear out faster. Therefore, it’s essential to use a charger that matches the battery’s specifications and not overcharge it.

Overall, understanding the lifespan of cordless drill batteries and taking proper care of them can help extend their usefulness and save you money in the long run.

Steps to Revive a Cordless Drill Battery

Are you tired of constantly buying new batteries for your cordless drill? Here’s how to revive a cordless drill battery and bring it back to life. The first step is to fully discharge the battery by running your drill until it dies completely. Then, clean the battery contacts with a mixture of water and baking soda to remove any corrosion or buildup.

Next, charge the battery for at least 12 hours, ensuring that it is fully charged before use. If the battery still doesn’t hold a charge, you can try a reconditioning method by running it through several charging cycles. However, if these steps don’t work, it may be time to invest in a new battery for your cordless drill.

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By taking care of your batteries and knowing how to revive them, you can save money and extend the life of your tools.

Step 1: Discharge the Battery Completely

If your cordless drill battery isn’t holding a charge like it used to, don’t despair just yet! You may be able to revive it with just a few simple steps. Step one is to discharge the battery completely. Use your drill until it’s completely dead and won’t turn on anymore.

This step is important because it resets the battery’s memory, allowing it to hold a charge more efficiently in the future. It’s also a good idea to let the battery cool down for a few hours before moving on to the next step. Now, you’re ready to start the process of reviving your cordless drill battery.

Step 2: Clean the Battery Terminals

Revive a Cordless Drill Battery If your cordless drill battery is no longer functioning properly, there’s no need to panic. There are plenty of ways to revive it, and one of the most common methods is to clean the battery terminals. First, remove the battery from the drill to ensure you can work with it safely.

Then, use a clean cotton cloth to wipe away any dust or debris that may have accumulated on the terminals. You can also use a small brush with stiff bristles to scrub lightly on the terminals. Make sure the terminals are also free from any corrosion or rust that may be preventing it from charging properly.

If you find any corrosion, gently scrub it away using a mixture of baking soda and water, or use a specialized terminal cleaner. Once the terminals are completely clean, reinsert the battery into your tool to give it a try. Cleaning the terminals is a simple yet effective step in reviving your cordless drill battery.

Step 3: Check the Voltage of the Battery

After checking the connections and cleaning up the battery, the next step in reviving a cordless drill battery is to check the voltage. This will give you an idea of how much charge the battery has left and if it’s worth trying to revive it. To do this, you need a multimeter that can measure DC volts.

Set the multimeter to DC volts and touch the positive and negative leads to the corresponding terminals on the battery. A fully charged battery should show around 20 volts. If it’s below 15 volts, then the battery has little to no charge and might be beyond saving.

However, if it’s between 15-20 volts, there is still potential for reviving the battery. Remember to never attempt to charge a battery that’s below 15 volts, as it can be dangerous and damage the battery further.

Step 4: Recharge the Battery

Now that you’ve disassembled and cleaned your cordless drill battery, it’s time to recharge it. This step is crucial in reviving a dead battery and bringing it back to life. First, make sure to use the charger that came with your drill battery.

Using a different charger could lead to overcharging or undercharging, which can damage the battery. Connect the charger to an outlet and then attach the battery to the charger. Most chargers will have an indicator light to show when the battery is fully charged.

It’s essential to let the battery charge completely before using it again. Over time, the battery’s charging time may decrease, indicating that it’s time to replace it. By following these steps, you can revive your cordless drill battery and get back to your DIY projects.

Tips to Prolong Cordless Drill Battery Life

Cordless drills have made our lives so much easier, but they come with one major drawback: the battery life. No one wants to be in the middle of a DIY project only to have their drill battery die unexpectedly. If you’re tired of constantly recharging your battery, there are some simple tips you can follow to prolong the life of your cordless drill battery.

Firstly, always store the battery in a cool and dry place, away from direct sunlight or heat. Secondly, charge the battery fully before using it, and avoid taking it off the charger before it’s fully charged. Thirdly, try to avoid using the drill in extreme temperatures, as this can damage the battery.

Lastly, don’t forget to keep the contacts clean and free of debris to ensure proper charging. These tips can help you revive your cordless drill battery and make it last longer, saving you both time and money in the long run.

Tip 1: Keep the Battery Cool and Dry

If you want to prolong the life of your cordless drill battery, consider keeping it cool and dry. Heat and moisture are the biggest enemies of batteries, causing them to degrade faster. When you’re not using your drill, keep it in a dry place away from direct sunlight or sources of heat.

Avoid exposing it to water or any liquids, as moisture can seep into the battery and cause corrosion. If you’re using your drill in hot weather conditions, take breaks in between to allow the battery to cool down. By taking care of your battery in these ways, you can help it last longer and save yourself the cost and hassle of having to replace it frequently.

Tip 2: Store the Battery Properly

One of the best ways to prolong the life of your cordless drill battery is by storing it properly. When you’re not using your drill, it’s important to store the battery in a cool, dry place. This helps to prevent moisture from building up in the battery, which can cause it to corrode and lose its charge over time.

You should also avoid storing the battery in extreme temperatures, such as in a hot car or freezing garage. Additionally, it’s important to keep the battery clean and free from debris or dust. This can help to prevent damage from occurring and ensure that it functions properly when you need it.

By taking the time to store your battery properly, you can help to prolong its life and reduce the need for costly replacements. So, the next time you put your drill away, make sure to put the battery in a safe and dry place.


In conclusion, reviving a cordless drill battery is a bit like performing CPR on an exhausted athlete. It may take some effort, patience and a bit of know-how, but with some simple steps and careful attention, your battery can be revived and ready to power through any DIY project. Remember to take care of your battery by charging it properly and avoiding overuse, and it will reward you with long-lasting and reliable performance.

Now go forth and conquer your next DIY challenge, with a fully-charged cordless drill in one hand and a clever quip on your lips!”


How does a cordless drill battery die?
Cordless drill batteries can die due to various reasons such as overcharging, sulfation, or simply reaching the end of their lifespan.

Can a dead cordless drill battery be revived?
Yes, a dead cordless drill battery can be revived through methods like jumpstarting, desulfation, or replacing the battery cells.

How can I jumpstart my cordless drill battery?
You can jumpstart your cordless drill battery by connecting it to a charged battery of the same voltage and letting it charge for a few minutes.

What is desulfation and how can it revive my cordless drill battery?
Desulfation is a method of reviving a dead battery by using a desulfator device or solution to break down the buildup of lead sulfate crystals inside the battery.

How often should I charge my cordless drill battery to prolong its lifespan?
You should charge your cordless drill battery only when it reaches around 30% of its charge capacity, and avoid overcharging it or leaving it unused for long periods of time.

Can I replace the cells inside my cordless drill battery?
Yes, you can replace the cells inside your cordless drill battery by purchasing replacement cells and soldering them onto the battery contacts.

How long does a cordless drill battery last on average?
The lifespan of a cordless drill battery depends on various factors such as the brand, type, and usage frequency, but on average, it can last for around 2-3 years before needing to be replaced.

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