OBDResource Car Battery Tester 6V 12V 24V 3 in1 Battery Load Tester Professional Automotive Battery Analyzer Alternator 100-2000 CCA Battery Loading/Cranking/Charging Test

This test unit is as advertised and can test 6, and 12 volt batteries. It’s easy to set parameters and read results. I’ve used it to check a variety of 6 and 12 volt marine and RV batteries. It worked well on all and easily spotted the weak batteries under load testing. Construction of unit is solid. I’ve only had it a couple of weeks but I think it will last a long time with proper care. The case it comes in is also nice.

Good tool happy with it

I was able to diagnose a battery problem that mechanics didn't. Works great & easy to operate.

Accurate and easy to use

I bought this battery tester last January 2024, use it once and went to test a battery last night and got nothing but beeps on a blank screen.. Looking to get a replacement or credit for this product ... I don't believe I can suggest buying this

Works as described and great for RVs checking 6 volt batteries.

Work with a lot of car and this was a good addition. Comes with instructions to help understand it better. i do recommend reading them first. There was some battery setting i didn't understand but that could be my fault. But the batteries i did test showed faults and if they were good as it should.

I have tested the voltage reading from this battery tester as compared to my trusted FLUKE 77/79 multimeter and my HP desktop Multimeter. The voltage reading of batteries using this tester was about 0.5 volt off the readings from other DMM's. I have used 5 separate 12 volt batteries with CCA rating from 540 to 760. The readings were not consistent over multiple readings on same battery (they could be 5-10% variances in reading). The voltage reading was consistently about 0.5 volt DC off the reading obtained by my test equipment. Maybe what I am expecting is not what is begin displayed. So, I left a message to the manufacturer, to see if there is any settings or test procedure/setup that I am missing.I did get a quick reaply back by next day. The content of the reply was that their test method is different and more accurate. My assumption is that bettery voltage level should be what is measured in a standard way; unless I am mistaken. I would think the 0.5+VDC difference between this tester and all my other DMM is a reasonable test of accuracy of the unit. See the attached voltage reading pictures comparing the differneces in voltage reported.Maybe all the cheaper battery testers have 5-10% varaiances in measurement. But, with the modern chips and manufacturing, I cannot believe that can be the case. It maybe that the unit I have is bad sample. I will test little more when the weather gets warmer and see if that makes difference. I measured the battery in car (3x) and outside the car (4x), and the reading by this battery tester was consistently off. Maybe 5-10% variance in reading is OK for normal use. I don't like this inconsistnat and inaccurate reading. Let me ponder whether to return this unit.