It is a really frustrating problem: You have your honey-do list in hand and go to grab a battery for your Hart power tool, but discover it is dead. Worse, when you put the battery on the charger, it doesn’t charge.

What can you do about it? In this article, we discuss several ways to get your Hart battery charging again so you can knock off the items on your list. It might be as simple as a tripped circuit breaker, or something that will require a little more effort, like cleaning off the terminals. Unfortunately, sometimes there is nothing you can do and the battery just needs to be replaced.

Which fix will do the trick for you? Read on to learn more!

Check the Charger with a Multimeter First

Check if your battery is actually charging by looking at the indicator light on the charger or taking note of any changes in the voltage reading on your multimeter.

If you don’t see any signs that your battery is charging, it’s possible that there is an issue with the charger itself or with the electrical connection between your battery and the charger.

How to use a multimeter to check the charger

If you’re not sure whether your battery is charging, you can use a multimeter to measure the voltage output of your charger. This will help you determine if there is any issue with the charger itself or with the electrical connection between your battery and the charger.

To use a multimeter, first find the battery that you want to test. Next, set the multimeter to measure voltage. Clip the black lead of the multimeter to the negative terminal of the battery and clip the red lead to the positive terminal of the battery. Finally, look at the reading on the multimeter to see how much voltage is being output by your battery.

The voltage reading on your multimeter, while the battery is still connected to your charger, should read above 12 volts. If the voltage level is below 12 volts, then a new battery is likely needed. If the voltage level is above 12 volts, there are a few other things to try.

Clean off the terminals

If you’re having trouble getting your Hart battery to charge, it’s possible that there is a bad connection between the battery and the charger. This could be caused by a number of things, such as corrosion or dirt build-up on the connectors.

If you notice that there is corrosion or other debris on your battery terminals, clean them thoroughly using a mixture of baking soda and water. This can help ensure that you have a good electrical connection with your battery and will allow for better flow of electricity to charge your battery.

First, unplug the battery from the charger and the charger from the wall. Then, mix baking soda and water until it forms a paste. Apply the paste to the terminals and use a brush or your fingers to scrub it in. Let it sit for a few minutes, then rinse it off with water.

Be sure to dry off the terminals completely before reconnecting the battery and charger. Once everything is dry, try charging the battery again. If it still doesn’t work, you might need to replace the battery or the charger.

Check that there is power

If cleaning the terminals doesn’t resolve the issue, check to make sure that there isn’t a blown fuse or tripped breaker somewhere in your house. If you’re not sure whether or not the power is on, you can check your breaker box to make sure. Just locate the breaker box in your home and take a look at the switches to see if they’re in the “on” position. If they’re not, flip them to the “on” position and wait a few seconds for the power to come back on. Once it does, you can try charging your battery again.

Your house may use fuses instead of circuit breakers, especially if it is an older home. The fuse is a small, cylindrical component that is located in your fuse box and is used to protect your electrical system from overloads. If the fuse is blown, it will need to be replaced in order for your battery to start charging again.

To replace it, first, locate the fuse that corresponds to your Hart battery charger and remove it. Then, insert a new fuse into the slot and test it out by plugging in your battery charger.

Consider Replacing the Battery

If none of these steps seem to work, it may be time to consider replacing your battery altogether. The lifespan of a 20v Hart battery can vary depending on a number of factors, such as how often it is used and the type of charger that is used. However, on average, a 20v Hart battery should last for around 2-3 years.

Get Back to Work with Powered up Batteries

To recap, this article provides a few tips for fixing a Hart 20v battery that is not charging. First, make sure to clean the terminals on the battery and charger. If that does not work, check to see if there is power in the house. If there is not, try flipping the breaker switches to the “on” position. If there is still no power, consider replacing the battery.

Regardless of which steps you decide to try, remember that resolving a faulty battery issue will often require some patience and persistence. But with the right knowledge and tools, you can get your battery working again in no time! Good luck!