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Winter shouldn’t bring unexpected car battery issues! Remove the uncertainty with the BT100. As winter approaches, your battery's performance can waver, leaving you unsure of its health. With the BT100, you can quickly and accurately check your battery’s condition for peace of mind this season.
RLR
2025-08-21 14:06:58
Very good, simple battery tester. This unit is temperature compensated and has separate testing capabilities to test a battery whether it is installed in the vehicle or disconnected. Tests separately for cranking amps and cold cranking amps. Provides state of charge status and charging recommendations. Provides state of health as well as replacement recommendation. As good or better than most commercial testers.
Adriel
2025-08-03 09:39:19
This was the deciding factor in whether I should replace my battery or buy a battery charger. The battery in my BMW discharged beyond the point of being recharged by the car. The dealership quoted me at approximately $600 for a replacement. After doing research, I found that having it charged may be the fix. This tool confirmed it. I bought a charger, charged the battery, and I’ve had no issues whatsoever. The charger I used was a NOCO Genius 10 amp.
rimfire47
2025-07-23 09:35:33
Seems to be a good product
Louis
2025-07-11 17:48:49
I purchased this to test my 6-volt deep cycle batteries used on my RV. As things sometimes work out the day I received my tester my cars battery light came on. I have never seen this light up when driving and seeing how I replaced the alternator about a year ago I felt it might have been the battery going bad. I opened the hood to inspect the battery which is now 3 year and 2 months old. (2 months past the free replacement warranty period). I was about to pull out the battery and go purchase a new one when I remembered I had just purchased this fancy battery tester.I hooked up the tester which powers on as soon as it is connected to the battery. The first thing I see is the battery voltage which was reading low. (Now worried about the alternator not charging the battery) I ran the battery test. The menu is easy to follow, and the tester had me perform actions like turn on my headlights then turn them off so it could measure the drop in voltage. Anyways good news was the battery was fine as identified by the test tool.I cleaned the post and reconnected and started the car and now the light on the dash was off and after driving around for about 30-45 minutes (maybe longer) I retested and the voltage had climbed back up and the tester was no longer telling me the battery needed to be charged.I also tested my 2 6-volt batteries. both are reading a low charge and they need to be replaced. I'm running a full charge on them now to make sure they are floated then will retest. If the test tool continues to tell me they need to be replaced I will take them back into Batteries Plus to have them test. The reason for this is my Inverter will not power up and throws a low voltage alarm which has me thinking one of the two new 6 volt batteries are bad. The test tool is telling me they both are bad so will continue my testing and will hopefully update this review with my findings.At this point I'm very happy with this tester, it is easy to use and seems durable.
dysfunctional vet OIF
2025-06-16 16:46:58
it is basically a plug and play, hook it up select the battery. im in a rural area, we all help one another and i can't tell you how often i have taken this somewhere to help someone out.since i bought it, it has never been wrong. i have the old box with the load and volt switch, i get the same results with this that fits in my pocket
Reynir Baldursson
2025-06-14 11:07:23
Great item
Len
2025-06-08 20:10:11
I needed to test my AGM Battery which was less than two years old this battery tester quickly told me the status of my battery voltage and CCA (Cold Cranking Amps) that were available. That said it paid for itself I was able to use my warranty to exchange the defective battery as well as be able to check the status of my other cars batteries making it easier to plan for replacements when needed. Great product everyone with a 12v battery should own one of these.
Kyle
2025-05-26 12:36:06
I'm very pleased with this FOXWELL BT100 Battery Analyzer so far. First it is smaller than the ones I use for work which is a plus to me as the smaller size makes it easier to carry, use, and store.Operating the battery analyzer is simple. The analyzer is powered by the battery you are checking, just connect the leads to a 12-volt battery and the LED backlit screen will light up showing the current voltage of the battery.To test the battery:*Press the "Enter" button and then use the arrow buttons to choose if the battery is "Out Of Vehicle" or "In Vehicle".*The select which type of battery it is "Regular Flooded", "AGM", or "Gel".*Select which battery standard to use. There are 8 choices, but "CA" (Cranking Amps) or CCA (Cold Cranking Amps) are two of the most common and usually shown on top of the battery.Now select the "Test" option. Once the test is complete you will get two screens of results.(see pics of screen shots)*Battery: Good Battery*Volts: 12.67 v*Measured: 802 MCA*Rated: 700 MCA*SOH: 96 %*SOC: 100 %*RES: 4.91 MR (Resistance - Measure Resistance)I've compared the results with a couple other battery testers and the results were very similar so it seems accurate. The only slight negative is I wish it came with a case, but for the price I paid I can provide my own.I hope this information helps. If something changes I will update this review.
Customer
2025-05-24 10:16:35
Perfect tool for quick battery checks.After a quick data entry only takes 5 seconds have the results.The accuracy is good.Since it is still new I can't speak anything about its durability.
Gerardo Hernandez
2025-04-25 10:50:45
Me gustó xq es muy sencilla la forma de revisar la bateria de mi auto
Kenneth J Freakley
2025-04-08 10:32:33
This tester is so easy to use. It's as easy as plug and play. I checked various batteries on the cars and off the car. All diagnosis was as I expected but confirmation was good as I didn't have to go to a garage or elsewhere which always saves you money. It is so easy to use, step by step on screen, I don't know why I didn't buy one sooner.
Kevin H.
2025-02-21 17:30:54
Easy to use, easy to read! I was happy with the info it provided.
scott
2025-02-14 18:58:28
Great product does the job it says and works better then drop tester thanks
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