TOPDON BT100 Car Battery Tester 12V Load Tester, 100-2000 CCA Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Car Truck Motorcycle ATV SUV Boat Yacht
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Availability:
20 left in stock
Arrives
Tuesday, Jul 28
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Features
- [Car Battery Tester] You can easily test and inspect your 12V lead-acid battery with this TOPDON car battery tester. The SOH (State of Health), SOC (State of Charge), Voltage, Current, Rating, and numerous other understandable analytical data are provided by this battery tester. It is compatible with 100-2000CCA regular flooded, AGM flat plate/spiral, EFB, and GEL for their optimum performance.
- [Wide Application] This 12V battery load tester can only be powered on once it is properly attached thanks to a safe passive testing approach. You may test the batteries of a number of vehicles, including cars, motorbikes, trucks, RVs, ATVs, SUVs, boats, yachts, lawnmowers, and even golf carts, without needing to charge the device first.
- [3 Testing Function] A battery health test will determine whether or not the battery is in excellent operating order. A cranking test will determine whether or not the electrical system has sufficient power to start the engine. Check to see that the charging current, rectifier diode, and generator are all functioning normally. This handy auto battery analyzer makes sure your summer road trips wont end on a flat.
- [Ergonomic Features] To help you rapidly determine the health of the battery, this load battery tester is built with three different colors of LEDs. It's easy to use because it operates through a menu system. Additionally, for a reliable and secure connection during the testing process, premium-quality copper clamps have polarity reverse prevention and spark proof features.
- [Great Choice] The TOPDON BT100 is small and compact, making it simple to keep in a glove box or center console. This battery load tester's rapid and precise results will enable you to decide whether your car battery needs to be replaced or jump-started making it an excellent choice for auto shops, garages, and DIY users who frequently check batteries.
Description
TOPDON, a combination of 2 words, “TOP” and “DON”, developed with the concept of conveying passion and ingenuity to take “Dare to Be the TOP” to fruition. Since day one, we begin with CONVICTION. We are dedicated to offering the high rank of services, products. We continue with INNOVATION. Our continual researching and developing ensures unmatched experience. We are enhanced by PERSISTENCE. Quality honors our roots and maintains high standards. Visit the Store Visit the Store
Brand: TOPDON
Power Source: Battery Powered
Style: For cars/ trucks/ Boats
Color: BT100
Item Weight: 9 Ounces
Power Source: Battery Powered
Minimum Operating Voltage: 12
Upper Temperature Rating: 140 Degrees Fahrenheit
Measurement Type: Voltmeter
Compatible Devices: Cars, Trucks, Motorcycles, Boats, ATVs, SUVs, Golf Carts
Style Name: For cars/ trucks/ Boats
Color: BT100
Item Weight: 9 Ounces
Item Dimensions: 5.3 x 3 x 1 inches
Specification Met: Cca
Brand Name: TOPDON
Model: BT100
UPC: 850028162088 632111309187
Warranty Description: TOPDON offers 30 days return & 12-month friendly customer service.Safety tips It’s important that you always turn off your car’s ignition when testing your battery, and always read the safety features section in the manual carefully to ensure optimum safety.
Manufacturer: TT TOPDON
Global Trade Identification Number: 88
Part Number: TT TOPDON
Included Components: 1*Car Battery Tester
Item Type Name: TOPDON USA - BT100 BATTERY TESTER
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Jul 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I just installed a brand new car battery and checked it with the TOPDON BT100. It showed the battery was bad, which probably saved me from being stranded. The battery was under warranty, so I got a new replacement. The tester is very easy to use and gives clear results. I especially like that it’s a true 3 in 1 tool: it tests battery health, checks the engine crank, and measures the charging system. Now I can conveniently check my battery anytime without going to AutoZone or O’Reilly Auto Parts. This is a great value and definitely worth keeping in the car.
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Reviewed in the United States on December 27, 2025 by Mike
Note: This is NOT a carbon pile tester of old but a great tool to perform a quick check. And it is also much lighter, convenient and more compact than Ol Smokey. I found this works best when directly connected to the battery vs the "access nipples" under the hood on my 2024 Audi A5 when testing for load. My battery in is in the trunk under the spare tire. When tested from the access points, the battery tested low but when directly connected, showed up a more believable 55% on the OEM battery. (Note I live in Florida and the heat takes a toll, so I have "learned" to test periodically.) On my bride's Ford Escape, you have to hold your tongue right to get good connections as the battery is under the cowl and I didn't feel like removing the hold downs to pry it out to get a better hands free connection but on that car, it showed a 80% on a 2 yr old Interstate ostensibly made for the hot climate. The other test functions are viable with the most interesting to me the ac ripple test (anyone who owned a 7th gen maxima can appreciate that early warning as those OEM alternators failed regularly every 100,000 to 150,000 miles with High Ripple (don't know if that issue still exists with their diode packs of today but it ran very hot under the hood and those diodes were NOT mil-spec!! :) ) I also appreciated the "dumb guy" indicators when you didn't ensure a good connection. Really helped with those "DOH!" moments. The voltage reading was spot on when compared to my fluke and old Simpson 260b. Nice Job.
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Reviewed in the United States on January 26, 2026 by LtLeary
Love this tool for the money, works great!
Reviewed in the United States on July 3, 2026 by William Bunney
Fast delivery. It's a pretty straightforward piece of equipment. Worked quite well out of the box. Make sure whatever you are connecting to, and the clips, are clean. The reason for only 4-Stars is that like many other testers. The leads are too short to allow a one person operation to do the charging system testing. They need to be at least 2-Meters, 6-Feet long for that test.
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Reviewed in the United States on January 15, 2026 by W. Anderson
Have had it several years using it every few months and it has saved me a lot of hassle and money. Allows me to track the health of the auxiliary battery in my hybrid so I know if I need to put it on a trickle charger.
Reviewed in the United States on July 11, 2026 by Vegan Doug
Love this battery tester! Great price for what it is. Super simple to use and accurate!
Reviewed in the United States on May 23, 2026 by Randy
Perfect price. Easy to use. Easy to read. I am not a mechanic but this unit can give you some troubleshooting help.
Reviewed in the United States on July 4, 2026 by John Stathes
I have been using a 500 amp carbon pile load tester to test lead acid batteries for many years. It works well enough, but it’s large, heavy, and tends to smell bad as it heats up when you use it. It also drains a significant amount of energy from the battery under test to the point where the user manual suggested to charge the battery after running a load, test. Also, the analog voltmeter, is not particularly accurate or easy to read in dim light or at an angle, due to parallax. I bought the TOPDON BT100 with low expectations, but I was proven wrong. The battery health (load) test works by putting a high load on the battery for a very short time, so it does not dissipate much power during the test. This has the advantage of allowing the device to draw very little total energy from the battery and thus generate very little heat. There is also no need to recharge the battery after the test. While the load is applied it measures the battery voltage and calculates the internal resistance of the battery and its capabilities for cranking amps (CA and CCA), as well as displaying its loaded and unloaded voltage. You can set the specified CCA of the battery before the test, which allows it to return a go / no-go result. One of the many advantages of this approach is that the tester is able to determine if the battery clips are not well connected before the test. I tested the BT100 on a number of lead acid batteries, including a 9AH UPS battery, an 18AH UPS battery, a 250AH AGM battery bank that I use for power back up, and my car battery which is rated for 520 CCA. In all cases, I got nearly identical results to the carbon pile tester. In addition to battery health, you can use it while starting the car to measure cranking time and the minimum battery voltage during cranking. You can also use it to test the charging system in your car, and of course, to report the battery idle voltage. Overall, I was pleasantly surprised at the quality results provided by this device. I’ve only owned it for a couple of weeks, so I can’t speak to its longevity, but so far it’s a huge win. Disclaimer: I purchased this with my own money. I was not asked to write this review, and these are my own opinions. Also, I am not an AI bot although I’m not sure how you could tell if I was :)
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Reviewed in the United States on April 28, 2023 by M Lewus