How To Fix A Drill Battery That Won’t Charge | Guide + Review

Fix a drill battery that won’t charge now has become a piece of cake. Many people think that they can’t get their drill’s dead batteries back to life. At the same time, it’s now just a myth. 

Lithium-ion batteries are an excellent modern-day marvel with one flaw. Sometimes they won’t charge up at all, no matter how many times we try. It can become quite frustrating after so much time has been spent trying unsuccessfully as well. 

There doesn’t seem like there’s anything else left then taking them back where we bought them from or throwing away this pricey piece of equipment altogether, right? 

But wait! What if you fix a drill battery without paying any extra cost or concerning any electrician? 

You heard me right. Now you do not have to buy a new $50 battery. You don’t even need to call your company and make a complaint because this stupid ‘defective’ battery is only two weeks old. 

Nor wait until they ship you a replacement before finishing up that project due in 3 hours (trust me!). All it takes is about 5 minutes’ worth of work on your end.

Curious about how you can fix a drill battery on your own? Okay, we are not going to wait for you anymore. Let’s begin this exciting and easy process to get back your drill battery’s life.


A DRILL BATTERY: Of course, keep your drill dead battery that won’t charge to fix it.

AN AC ADAPTER: You need an AC adapter. Because we will use it as a jumper cable, make sure that you use any old cell phone adapter because this will not be the same as before.

A MULTIMETER: This will help you to identify the voltages while fixing a drill battery. However, it is optional. But using a multimeter to improve a drill battery can make the procedure more accessible and fun.

So after collecting all the necessary stuff, move on to the step-by-step procedure to fix a drill battery.


You might be able to fix a drill battery problem by doing this. Try pulsing the power of your charger (with the battery in it) for 10 seconds and then unplug it again, a few times. If that doesn’t work, give our guide below a try.

STEP 1: You may have a pile of old AC adapters in the back of your closet, but cutting off their ends can be an easy way to make them functional again. All you need is scissors and some tape.

STEP 2: Separate and strip off 1″ of each wire. You have just made a quick and easy way to jump-start your drill battery.

STEP 3: First, open the battery by removing some screws. Underneath, you will find a screw that was hidden underneath another piece of plastic. It took a while to figure out how to get this off!.

It turned out two things were holding it in place: A small strip on the side and four tabs at each corner. Once these had been pried open with a tiny screwdriver, everything came free quickly enough.

STEP 4: With a swift motion, pull the top off of the battery case and set it on the ground beside you.

STEP 5: The drill’s battery is housed by two plastic pieces found on the side of your tool. To remove it, press them in and allow gravity to guide the process.

STEP 6: Now, you should locate the battery pack attached by a wire harness. Take it out so that you can replace the damaged cables underneath.

STEP 7: To find out how much power you have left in your battery, plug it into an electronic device or use a voltmeter. 

Set your Multimeter to read volts. For testing an 18-volt battery, choose the 20-volt setting. This will give you a more accurate reading.

STEP 8: Carefully touch the probes to their respective terminals; ensure that you are not connecting them. Once they’re in place, read the voltage shown on your Multimeter with a reassuring look at its screen.

NOTE: If you don't have a multimeter, you can skip steps 7 and 8.

STEP 9: To get a battery back to life, first, plug in the AC adapter. Then touch the black wire (negative) and white or striped one (positive). Wait about 60 seconds before disconnecting them again. This will give your battery enough charge for you to start it up.

NOTE: When touching two wires, one hand must hold the positive wire and hold on to a negative wire.

STEP 10: Test your battery pack’s voltage to make sure it is working as expected. If the voltage doesn’t rise, stop this process at that moment because continuing the process can damage your battery.

STEP 11: If you still only get a red flashing light and your battery won’t charge. Try boosting the voltage of the charger to between 10-14 volts. When you increased the battery from 11 to 14 volts, it began charging again.

STEP 12: With the charger plugged in, you will wait for it to recognize your battery. Pressing “pulse” on the battery and testing power until you have a green light is all that’s left.

STEP 13: With those as mentioned above few simple steps, you can fix a drill battery, get your battery back up to full power, and keep it that way.


Here we are going to mention some highly durable batteries for cordless drills. These batteries have standard features with the quality specification. Using any of these batteries, you don’t need to fix a drill battery every few months.

  • Lightweight
  • Fuel gauge charge indicator
  • LED indicator
  • Three years limited warranty
  • 20 volts
  • Difficult to charge with other brands of chargers


DEWALT 20V Lithium-Ion Battery XR packs provide up to 60% more capacity than the standard MAX battery pack. The 3-LED Fuel Gauge of DEWALT’s new batteries allows for immediate feedback on the state of charge.

As well as no memory and virtually no self-discharge so that you can continue working with little downtime. 

Lightweight at only 1.4 lbs, it is compatible with all your favorite tools in our line – something every professional contractor needs this season.

  • 18 volts
  • Two packs of batteries
  • Hold charge for a long time
  • Inexpensive
  • Ideal for smaller jobs
  • Doesn’t charge with AC470013 and AC840093 charger


The triple protection design of the battery ensures that it will not overheat, overload, or be charged too quickly. The R840085 Batteries are a vast improvement from other batteries due to their safety features and build quality. 

This battery for cordless drills has been removed from retail packaging for shipping purposes (Bulk Packaged) but is perfect when you receive your purchase.

  • 20 volts
  • Longer runtime
  • Enhances the performance of drill
  • Ergonomic design
  • Two-year warranty
  • Has short runtime as compared to other Black and Decker batteries


Black & Decker is one of the best companies when it comes to power tools. Their newest innovation is cordless technology. Their 20-volt max lithium-ion battery pack can be integrated seamlessly with all Black and Decker’s other outdoor power equipment for longer runtime and increased performance. 

The sleek design makes installation a breeze as there are no clunky cords or bulky lawnmowers that take up space like before. It also includes an LED indicator on the front, so you know exactly how much juice is left without having to guess if it needs charging yet.

The 2-year warranty guarantees your investment won’t go down the drain anytime soon from unforeseen malfunctions. Or defects while using this product which will give you peace of mind.

  • Compatible with star protection tools
  • LED charge indicator
  • Offers consistent power
  • Doesn’t affected by high temperature
  • 18 volts
  • Not offers a valid warranty


Imagine a world where you never worry about your tool dying on the job. That’s what (Makita) Star Protection tools have to offer, with its innovative battery that offers consistent power and runs time in extreme temperatures.

Thanks to it being made from high-durability lithium-ion cells, which are equipped with an integrated LED charge level indicator so you can monitor how much juice is left at all times.

Best of all, this revolutionary product also comes fitted with star protection computer controls which protect against overloading, over-discharging, or overheating – meaning they’re not just tough, they’re smart too.

  • 40 Volts
  • Rechargeable
  • Extremely versatile
  • Highly durable
  • Ergonomic design
  • Only compatible with G-MAX 40V Tools and Charger Model 29482


The G-MAX 40V Lithium-Ion Battery offers fade-free power with no memory loss after charging. This means that you can use the same battery for as many jobs without wasting time and effort to recharge between projects, which is especially beneficial when tackling large tasks like a landscaping project in your backyard.

The quick charge time of 120 minutes allows users to quickly resume work on their next job or task afterward if they need more juice from the tool but didn’t have enough spare batteries available at home or close by while working last night’s DIY project before bedtime.

This feature also saves money because it doesn’t require purchasing another set of batteries just yet. The straightforward design snaps into any tools needed and features an indicator light to tell you how much charging is left.


Q: What drill battery is best?

A: Lithium-Ion batteries (Li-Ion) are the newest, most advanced technology in rechargeable battery power for cordless tools. They outperform all other types of batteries and offer more advantages over them, including less weight, a longer lifespan between charges, higher voltage output than traditional NiCad or Nicads. 

Their predecessor technologies have been around since 1859! The only downside is the price; they’re costly to buy.

Q: Can a dead lithium battery be recharged?

A: If your rechargeable Lithium-Ion (LiOn) battery has been drained to zero percent but refuses to charge back up again, don’t give up. Store the device inside of a recently emptied fridge with some ice on top. This is the easiest way to fix a drill battery that won’t charge.

Q: How long do drill batteries last?

A: A cordless power tool battery should last at least three to five years with proper care. Responsible owners can expect their batteries to be able to take on more than 3,000 charge cycles before they become unusable or stop holding a healthy amount of voltage.

Q: Do lithium batteries go bad if not used?

A: Yes! New batteries that have never been used Under normal circumstances can go wrong if you don’t properly take care of them.


We wind up this informative article with the proper guide to fix a drill battery that won’t charge and some best drill batteries products. Now it’s your turn to select the correct battery just according to your drill and use the technique to fix a drill battery when it is needed.

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