Our Favorite Picks:
The 10 Best 12V Battery Tester Reviews:
SaleBestseller No. 1 
KONNWEI KW208 12V Car Battery Tester, 100-2000 CCA Load Tester Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Car Truck Marine Motorcycle SUV Boat
- 【Automotive Car Battery Tester】 As one of the most cost-effective products of KONNWEI, it's a perfect Christmas gift. KW208 can test all 12V 100-2000CCA batteries including regular flooded, AGM flat plate, AGM spiral, or gel batteries. Provide overall analysis of batteries’ health and help you know their status in advance before it dies. KW208 battery tester support cranking and charging system test also alternator and starter test.
- 【Display Overall Batteries Data】KW208 12V Battery Load Tester gives you the basic battery parameters such as voltage, internal resistance, cold cranking amp and AH capacity, battery health and charge status. Additionally, battery cca tester will also show you professional advice whether to replace or charge the battery.
- 【 >99.5% Accuracy】Thanks to KW208’s powerful and smart chip, it provides more than 99.5% precise testing reports within milliseconds(testing results refer to US Midtronics), greatly improved the testing speed compared to other battery testers.
- 【Plug and Play】 KW208 Battery load analyzer allows you to test batteries both in-vehicle and out-of-vehicle, and even test dead batteries. Just connect the tester’s clips with battery then it will turn on and ready to test and analyze battery. It’s that easy!
- 【Starter& Alternator Tester】KW208 not only a great battery load tester that tests batteries cranking & charging system but also can test alternator's charging and starter's cranking conditions. And it can switch up to 8 languages for different needs.
SaleBestseller No. 2 
Cartman 12V Car Battery Alternator Tester, Test Battery Condition & Alternator Charging, LED Indication
- LED display indicates condition, for 12V battery only.
- Alternator state check, battery state check, check before charge and overload display.
- Alternator check : accelerate your engine to 2000 rpm when the green light is lit ,charging circuit is ok.
- Battery check: indicate the percentage charging in the battery .
- Charger check: when green light is lit, charging is complete.
Bestseller No. 3 
NEIKO 40510A Car Battery Tester | 100 AMP 6 and 12 Volt Automotive Load Checker | CCA Analyzer
- [CONVENIENT]: Whether for the home, garage, or at the shop, the Neiko battery load tester is portable and DIY compatible for diagnosing and applying load to car, van, boat, truck, SUV, motorcycle, RV and other automotive 6 & 12 volt batteries.
- [QUALITY]: Tester body features protection-encased analog voltage meter display, anti-sparking internal switchgear and external handle grip at top for portable carrying.
- [DURABLE]: Copper clamp connectors feature red positive and black negative rubber grips to easily designate test clip placement on battery terminals.
- [PERFECT FOR MECHANICS]: Load on test switch (hold load for maximum of 10 seconds) draws battery current to simulate starter motor draw for accurately and easy to read determining battery condition.
- [ACCURACY]: Technical specifications: Fixed load current of 100 AMP, 100 AMP load test for 12V batteries up to 1000 Cold Crank Amps, 50 AMP load test for 6V batteries up to 1000 CCA. Voltage accuracy of ± 0.2V.
SaleBestseller No. 4 
12V Car Battery Tester, TOPDON BT20 Battery Load/Voltage Tester 100-2000CCA, Cranking&Charging Test via App, Record Voltage History, Automotive Battery Analyzer&Checker for Car Truck SUV ATV Boat
- 【Suprising Updates for BT20 in 2023】TOPDON BT20 is updated with more features since 2/13/2023. 1. Measures CCA/Ah/GB/SAE/BCI/CA/EN/IEC/DIN/MCA; 2. Test more battery types-NORM/AGM/EFB/GEL; 3. Display more results: battery/voltage status, SOC&SOH (NOTE: the test result shows SOH in percentage only, not in exact value). Customers who bought BT20 before 2/13/2023 can push an update to have access to the new features.
- 【A Budget-Friendly Car Battery Tester】As a battery tester below 30 bucks, it features 4 testing modes: battery load tester (range 10V-20V), voltage test, cranking test, and charging test (alternator tester), the latter 2 test modes are availabe only with APP, offering you more value for the money. NOTE: For 12V lead-acid batteries.
- 【Fast&Accurate Diagnosis within 1 Second】Simply click the TEST button, and get the testing results within 1 second. This battery tester will display the battery life by way of Low/Medium/High. Adopting the latest conductivity testing technology (up to 99.5% test accuracy). Thus, it makes a great choice for users who want to get results quickly. NOTE: Bluetooth is to be connected via APP, not phone setting.
- 【Expanded Voltage, Cranking, and Charging Tests with APP】Easily connect to this car battery tester via Bluetooth to get additional cranking, charging, and voltage testing capabilities. Easily view real-time voltage waveform graphs with data playback functionality. NOTE: Bluetooth is to be connected via APP, not phone setting.
- 【Comprehensive Vehicle Coverage & Multi-Language Support】Plug & play operation. Simply connect the testing clamps to the battery and you are ready to analyze. This 12V battery tester works on a variety of vehicles with 12V Lead-acid batteries such as boats, motorcycles, ships, and trucks. Also this auto battery tester easily switches between 8 different languages.
Bestseller No. 5 
AUTDER 12V/24V Digital Car Battery Tester, Battery Condition Tester & Alternator Charging System Analyzer, Automotive Voltmeter with LCD Display and LED Indication, Lead Length 23.6 Inches
- 🚗 Reliable Battery Testing: The AUTDER AD-808 battery tester is designed for testing both 12V and 24V batteries for a wide range of vehicles including cars, motorcycles, trucks, RVs, ATVs, SUVs, boats, yachts, mowers, and even golf carts. The accuracy of the car battery voltmeter is close to 0.01V, providing reliable results
- 🔥 Alternator Charging System Analysis: In addition to determining whether a vehicle battery needs replacement or a jump, the AD-808 can also test the status of the alternator output to prevent damage to the battery from overcharging or incomplete charge
- 🎯 Easy to Use: With its intuitive design, the AD-808 has three gear modes for testing the alternator, 12V battery, and 24V battery respectively. In the middle gear, the LCD screen displays the real-time voltage while the LEDs indicate the alternator status. Shifting to the 12V or 24V gear displays the real-time voltage on the LCD screen and the LEDs indicate battery status
- 👍Protection Features: The AD-808 comes equipped with reverse-hookup protection, preventing damage to the device in case of an incorrect connection. Additionally, the voltage test range is 4-30V DC, and when voltage is out of range, the screen displays 'LO' (＜4V) or ‘HI’ (＞30V), ensuring protection against over-voltage
- 🙂Package and After-Sales Service: Each package includes the AD-808 battery tester, alligator clamps, a cigarette lighter plug adapter cable, and a user manual. We provide one year of warranty service and 24-hour online support. If you have any questions, please don't hesitate to contact us
SaleBestseller No. 6 
Schumacher BT-100 Battery Load Tester and Voltmeter - 100 Amp,Black
- TRUSTED TESTING: Test load, battery condition, and starter motor draw; 50 Amp load test for 6V batteries and 100 Amp for 12V batteries; tests up to 1000 CCA
- COMPLETE DIAGNOSIS: Delivers a complete charging system diagnosis for batteries in cars, small trucks, RVs, motorcycles, ATVs, boats, and lawn tractors
- SIMPLE OPERATION: Top-mounted rocker switch for ease of use and highly visible meter readings
- HEAVY-DUTY CLAMPS: Super-grip, heavy-duty, color-coded battery clamps
- STEEL CASE: Durable steel case with baked enamel shell and rubber-insulated carrying handle; ventilated to stay cool
SaleBestseller No. 7 
AstroAI Digital Multimeter, Voltmeter 1.5v/9v/12v Battery Voltage Tester Auto-Ranging/Ohmmeter/DMM with Non-Contact Voltage Function, Accurately Measures Voltage Current Amp Resistance Capacitance
- VERSATILE SETTINGS: The AstroAI Digital Multimeter accurately measures AC/DC Voltage, AC/DC Current, Resistance, Continuity, Capacitance, and Tests Diodes and Batteries (1.5, 9, 12V Battery Settings)
- NON-CONTACT SAFETY: This DMM is designed with safety in mind. The NCV Function minimizes exposure to live wires; the probe works for outlets, sockets, terminals, and more
- PRACTICAL FEATURES: When using a Multimeter, the small details like Data Hold, a Large Backlight LCD Screen, Kickstand, and Low Battery Indicator help get the job done better and faster
- TROUBLESHOOTING MADE EASY: Whether the job is a quick DIY continuity check or a complex problem, the durable design and consistent readings pair well for a both long days in the field or tinkering in the garage
- SAFETY FIRST: Two integrated fuses rated at F500mA/600V and F10A/600V; Anti-Burn with double ceramic fuse and thermistor protection circuit; The fuses can protect the multimeter effectively; Overload protection on all ranges. 3 Year Warranty provided by AstroAI.
Bestseller No. 8 
Minn Kota 1820087 MK-BM-1D Digital Battery Meter , Black
- Monitor the voltage level and “state of charge” of any 12-volt battery
- LED display that indicates full, 2/3, 1/3 or 0 “state of charge"
- Easy to store anywhere
- MinnKota Product Code 1820087
SaleBestseller No. 9 
MOTOPOWER MP0514A 12V Digital Car Battery Tester Voltmeter and Charging System Analyzer with LCD Display and LED Indication - Black Rubber Paint
- 🔥【Easy Operation】- Connect and Go. It provides a quick reading to determine if a vehicle battery needs a jump or replacing and also the alternator output status. Various Colored LEDs indicate the battery or the alternator status.
- 🔥【Safety Ensured】- Reverse-hookup and Over-voltage protection, making it safe and simple to use. The Digital Voltmeter Testing Range: 4-20V DC. 【If the voltage is under 4volts, the screen will display - "LO"; Above 20volts, the screen will display - "HI"】
- 🔥【High Accuracy】- With a Four-character lighted digital display, the voltage testing accuracy will be close to 0.01volt. 【NOTE: Verify the counterfeit with only 3-character display. The accuracy is only 1/10 of ours.】
- 🔥【Rubber Paint Body to achieve the original quality】- Black Rubber Paint on the body surface to achieve the best feeling. As the inventor and the manufacturer of the tester, we are keen on the details to ensure the brand quality and the good custome buying experience.【NOTE: The counterfeit doesn't include the rubber paint on the body at all. 】
- 🔥【TWO-YEAR Warranty and Lifetime Service】- Direct source from MOTOPOWER factory. Just REGISTER your product on the manufacturer's website to activate your warranty. 30 days money back and 24/7 friendly customer service.
Bestseller No. 10 
RELMON Battery Load Tester, Automotive Battery Load Checker 12V 100A / 6V 50A
- 【Convenient Reading】The battery load tester is easy to use and read of 6V and 12V batteries for cars, trucks, RVs, motorcycle, boats and so on. Portable and quick to operate at home or garage instead of going to the shop for battery reading.
- 【User-friendly Design】There’s an insulated carry handle at the top for safe and comfortable carrying. The copper clips are equipped with red positive and black negative rubber grips to designate test clip placement on battery terminals effectively.
- 【Specialized Tester】The battery load tester tests battery condition, load, starter motor draw and complete charging system diagnosis. Great for efficient discharge and determine the battery is good or not.
- 【Ventilative Surface】It is suitable for heavy-duty use with its high-quality material case. The surface is perforated that provides ventilation to avoid overheating, ensuring safe and stable operation.
- 【Technical Specifications】The battery load checker tests 6 and 12 volt batteries up to 1000 CCA, 50 Amp load test for 6V batteries and 100 Amp load test for 12V batteries. The voltage accuracy is ± 0.2V.
Last update on 2023-05-28 / Affiliate links / Images from Amazon Product Advertising API