10 Best Car Battery Testers of 2021

Jerry Wilson
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The days are gone when a car battery is a simple and inexpensive affair. Today, a car battery needs a lot more because of the increasingly advanced and complicated ECU and electronics that a new car uses.

If your car battery is older than a few years, it’s likely that it is already showing signs of a failing system. That’s why you should particularly make sure that your car battery is in tip-top shape in case you need to drive over 50 miles away.

But the problem with your car battery is that you cannot immediately tell if your battery is already on the way out. That’s why you need to make use of the best car battery testers to help you quickly and easily check the condition of your car battery.

You’ll never have to worry about whether your car battery is functioning optimally or not. You can easily find a reliable car battery tester to assess the problem and whether your battery needs to be replaced or not.

NameCategoryProduct
Battery Tester FOXWELL BT705 Automotive 100-2000 CCA Battery Load TesterBest OverallBattery Tester FOXWELL BT705 Automotive 100-2000 CCA Battery Load Tester
CARTMAN 12V Car Battery & Alternator TesterBudget PickCARTMAN 12V Car Battery & Alternator Tester
ANCEL BST500 12V/24V 100-2000 CCA Automotive Battery Load TesterUpgrade PickANCEL BST500 12V/24V 100-2000 CCA Automotive Battery Load Tester

1. Battery Tester FOXWELL BT705 Automotive 100-2000 CCA Battery Load Tester

Our rating: 9 / 10

Battery Tester FOXWELL BT705 Automotive 100-2000 CCA Battery Load Tester

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Pros:

  • Easy to read LCD display
  • Accurate Results
  • Affordable Price

Features:

Small size and light weighted, only 6.8 x 2.9 x 0.9 inches and 12.6 ounces, easy to carry

Standard supported: The car battery diagnosis scan tool is compatible with all vehicles

2. SOLAR Digital 12V Battery and System Tester

Our rating: 9 / 10

SOLAR Digital 12V Battery and System Tester

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Pros:

  • Well made
  • Safe and easy to use, and quick to give feedback
  • Reputed brand with years of experience in making top-notch auto and car electronics

Car owners deal with the issue of car battery performance on a daily basis, and it’s important to maintain them properly otherwise they might end up damaging your vehicle’s electrical system. To solve this issue, we reviewed the most reliable battery and system testers available on the market today.

The first product on our list is the Solar Digital 12V Battery and System Tester. This portable battery tester is easy to use and comes in a nice, compact design. It has a backlit LCD display for clear, easy-to-read dials. The tester allows you to check your batteries’ performance and prevent damage to your vehicle’s electrical system.

The Solar Digital 12V Battery and System Tester measures DC resistance, AC Voltage, Tests for starter and cranking, and battery capacity for 6V, 12V, and 24V batteries.

3. Schumacher BT-100 100A Battery Load Tester and Voltmeter

Our rating: 9 / 10

Schumacher BT-100 100A Battery Load Tester and Voltmeter

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Pros:

  • Cost-effective
  • Works with all battery types
  • Easy to use
  • Variety of uses
  • Fairly lightweight

The Schumacher BT-100 is one of the best battery load testers you can buy. It works with all battery types, and it comes in at a very affordable price. At 6.6 lbs, it’s pretty lightweight and easy to carry around in a variety of situations.

This multi-functional tool allows you to conduct load tests on a dead or weak battery as well as tests on battery-powered devices.

Another great use of this versatile battery tester is for devices that use rechargeable batteries. With it, you can test your re-chargeable batteries to see if they’re still holding a good charge and whether they need to be recharged soon.

4. Amprobe BAT-250 Battery Tester

Our rating: 9 / 10

Amprobe BAT-250 Battery Tester

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Pros:

  • Best budget reading for car batteries
  • Operates on both 12V and 24V batteries
  • Acuraley 120-Volt charger included
  • Battery beeper to facilitate fast trouble-now diagnosis

Cons:

  • No load tester feature
  • Limited battery terminal clips
  • Battery clips don’t hold on for very long

The Amprobe BAT-250 is my top pick for testing automotive batteries. It takes a lot of guesswork out of assessing a battery’s state of charge.

It operates on both 12V and 24V batteries. The device has a large, easy-to-read LCD screen, which allows you to quickly determine if a battery needs replacing or if it has plenty of reserve to miraculously start your vehicle.

The BAT-250 features a battery beeper, which will help you determine if a battery is dead or close to it. This will help you avoid driving around with a battery that’s on the verge of going out and getting stranded.

5. ANCEL BA101 Professional 12V 100-2000 CCA 220AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool

Our rating: 8 / 10

ANCEL BA101 Professional 12V 100-2000 CCA 220AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool

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Pros:

  • Easy to use
  • Lightweight and compact design
  • Accurate diagnosis results

Cons:

  • Batteries have been reported to blow up in some cases
  • Power cord is too short

Ancel Professional 12V 100-2000 CCA 220AH Automotive Load Battery Tester Digital Analyzer Bad Cell Test Tool is a heavy duty car battery tester that is perfect for the do-it-yourselfer or auto mechanic.

This battery tester is designed to go in-between the clamps of a car battery in order to measure the voltage and detect bad cells. To do this simply plug the clip into the positive clamp and the tester into the negative clamp.

As you can see this battery tester has a very simple design; it’s extremely easy to use and highly portable. The Ancel BA101 comes with a digital screen measuring 2.45 inches in length.

6. MOTOPOWER MP0514A 12V Digital Car Battery Tester Voltmeter and Charging System Analyzer

Our rating: 8 / 10

MOTOPOWER MP0514A 12V Digital Car Battery Tester Voltmeter and Charging System Analyzer

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Pros:

  • Affordable
  • Accurate
  • Easy to use
  • Lightweight
  • Non-slip grip
  • Numerical and visual feedback
  • Large LCD screen

Cons:

  • Design looks a little outdated
  • Item may stop working after prolonged use

I was surprised at how much value you get with this car battery tester. It offers a lot of value for the dollar. Its LCD screen is large and easy to read. The grip and thumb-friendly buttons make it easy to use even for my child. The device is easy to use despite my lack of technical background.

The device plays three different sounds to indicate the battery status: an audible beep when the tests are completed, two flat beeps when the battery is weak, and a different tone when charging is required.

The device comes with a handy 9V battery and a detailed booklet that has clear step-by-step instructions for operations.

7. OTC 3181 130 Amp Heavy-Duty Battery Load Tester

Our rating: 8 / 10

OTC 3181 130 Amp Heavy-Duty Battery Load Tester

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Pros:

  • Built-in compressor and gauge
  • Comes with wheels

The OTC 3181 Heavy-Duty Battery Load Tester checks a battery’s voltage, horsepower draw, load test, and more.

Constructed out of heavy-duty metal, it can handle 11,000 pounds of load testing. It has a built-in compressor that charges the battery being tested.

The tester has an LED readout, user’s guide, and owner’s manual.

8. CARTMAN 12V Car Battery & Alternator Tester

Our rating: 8 / 10

CARTMAN 12V Car Battery & Alternator Tester

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Pros:

  • Works With Most Cars
  • Easy To Use
  • Simple Design

Cons:

  • Doesn’t Work On All Battery-Related Issues
  • Battery May Need Replacing

The CARTMAN 12V Car Battery & Alternator Tester – Test Battery Condition & Alternator Charging (LED Indication) is a very useful tool if you’re looking to save money from an unnecessary car service or battery replacement.

This inexpensive device can check alternator voltage, battery terminal voltage, and verify to see if the alternator is boosting the battery. This will let you know if you have a problem with your car’s charging or electrical system.

Just plug this device into your car cigarette socket and press the light button on the lower left of the gadget and it’ll last for more than 30 seconds. You can now check the alternator’s charging voltage with the button on the bottom right. Now use the bottom left button to check the terminal voltage. If everything is in order, the light button will light up.

9. ANCEL BST500 12V/24V 100-2000 CCA Automotive Battery Load Tester

Our rating: 7 / 10

ANCEL BST500 12V/24V 100-2000 CCA Automotive Battery Load Tester

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Pros:

  • Easy to understand and use
  • Super useful for testing old car batteries
  • Lightweight and portable

We checked this model against several competitors like the Schumacher PS-1. The review unit came in the standard issue plastic packaging with clear instructions and setup recommendations on the back side of the package.

This is the main unit or the “brain” of the tester with a connection for the cables. The device works comfortably with the common automotive battery pack that has the negative and positive ends protruding out of its case. We also have a number of “normal” batteries that have a button and the battery is inside the case.

We used a set of automotive cables to connect to the battery. There are proper instructions listed on the back of the package on how to use these cables. A few notes to add to use with this device: The device reads the battery voltage accurately. The device can also test the charging system on a dead battery.

10. 0.9 VAC to 9 VAC

Our rating: 4 / 10

0.9 VAC to 9 VAC

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Pros:

  • Fast charging with dual device
  • Handy charging method
  • Easy to use
  • Excellent customer service

The Anker PowerPort 2 is a compact dual USB charger with two ports that can pump out up to a combined 6.8 amps to charge two devices simultaneously, and it will do this even if your devices are multi-device capable with an iPhone 6, iPhone 6 Plus, Galaxy Note 5, or a Galaxy S6. This will charge your devices quickly, and this product comes with a USB wall charger and a micro USB cable.

Both of these items will allow you to charge an iPad at full speed, and you can charge two phones simultaneously. You do not need to struggle with trying to work with an individual outlet with this charger, thanks to its ability to charge two devices at once. You will be able to charge multiple items at the same time.

If you like to travel, this charger will fold up into a very neat little cube. To help with safety, this charger has overcharge protection. It will stop charging when your device is full. This charger will charge two devices at the same time at their maximum capacity, and it is ideal for those who like to travel.

Frequently Asked Questions (FAQ)

What is the best car battery tester?

Testing a car battery is one of those household maintenance jobs that almost every car owner needs to perform at one time or another. Having your battery die without warning is never a good thing, so knowing how to test a car battery is an important skill to have.

You can test a car battery with a special meter or with just a few common household items. Let's take a look at both methods and find out which one will work best for you.

Are car battery testers accurate?

Back when the car battery was the only point of power for the vehicle, yes car battery testers were pretty accurate. However, not so for today’s cars. Today’s vehicles have a lot more functionality and with that comes a lot more components which car battery testers can’t monitor. The alternator is responsible for a lot more and many manufacturers are now using smart alternators that take care of problems before they get bad. This allows the alternator to work very efficiently, which impacts how well your car functions.

The alternator also makes it hard to know for sure if your battery has a problem. We suggest using either an alternative or in combination with a car battery tester.

How can I check if my car battery is good?

One of the first things to check when you suspect a charging issue is the voltage of your battery with a multimeter following the steps below:

Make sure your car is parked in a cool shaded area, and only then remove your battery cables.

Get a good quality digital Multimeter. They are cheap and very reliable.

Connect the negative probe of the multimeter to the negative terminal of the battery.

Then connect the positive probe to the positive side of the battery.

Check the voltage of the battery. This will tell you if the battery is dead or good. If the reading on the multimeter screen is below 10.5v, then your battery is in bad shape.

If your battery is low on charge, remove the battery cables and measure the voltage again. If you see a difference between the reading of the first and second readings, then your car has battery drain problems.

How do car battery testers work?

Most of the high end car battery testers have a clamps that you’d place on the battery’s terminals. The tester would then check whether there’s a load on the battery. It would do this by looking for resistance. If your battery is dead or nearly dead, there will be no resistance and the battery tester would read a low amp value. If the battery is fine, there would be high resistance and the tester would read a higher amp value. Some battery testers also use an LCD to indicate voltage.

This is a quick and very practical method for testing a car battery. However, this is not the case for all car battery testers. Most of these testers rely on the old-fashioned method of using dummy load tester, which means you’d have to put load on the battery to get a reading.

Conclusion

Car batteries are critical to keeping your vehicle running. Given that many car manufacturers won’t put themselves on the hook for replacing the battery if yours dies (or are otherwise unable to do so), it’s important to make sure that you can test your own car's battery.

Our Recommendation

NameCategoryProduct
Battery Tester FOXWELL BT705 Automotive 100-2000 CCA Battery Load TesterBest OverallBattery Tester FOXWELL BT705 Automotive 100-2000 CCA Battery Load Tester
CARTMAN 12V Car Battery & Alternator TesterBudget PickCARTMAN 12V Car Battery & Alternator Tester
ANCEL BST500 12V/24V 100-2000 CCA Automotive Battery Load TesterUpgrade PickANCEL BST500 12V/24V 100-2000 CCA Automotive Battery Load Tester