BT900 Car Battery Tester 12V Load Tester, 5-3000 CCA Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Car Truck Motorcycle ATV SUV Boat Yacht

I have a few batteries that have issues, so I decided to pick up a battery tester. The one in the pictures is a lawn mower that constantly needs jumped, so I wanted to make sure the battery itself was good.The unit is actually powered by the battery that you are testing, so it's as easy as hooking up your positive and negative and then entering your CCA. I was able to run it off of a powerbank on a completely flat battery, but I think it will work best if I charge the suspect battery first, and then test so that I get a true reading. The screen is bright, the clamps are strong, the unit feels sturdy, and it works well as a quick check on a battery you're unsure of.

Work like a new one lol very good condition very good condition work fine

A little more complicated than my old tester with a heating coil and analog meter. It will do more test but need to keep the manual with it for testing.

It is easy to use and has rich functions. It can measure cars and motorcycles and detect waveforms. It is very convenient.

Great tester works great...

Many may begin having power problems in a car and instantly assume the battery is the cause. Yet an alternator not recharging the battery can be the real problem. This will test each to see where the real problem is. You just select the test and it tells you what to do (like rev the engine for the alternator test, etc). Pretty easy to use, just need to learn a few terms like "SOH" for battery "State of health" and "SOC" for "State of charge". I even had a teen with drivers permit try it out and it wasn't too hard for him. Some shops may try to say "You need everything replaced" and charge a bunch for little, so don't be afraid to check it yourself for a lot less.

I tested this on two vehicle batteries, one three months old and another 4 years old. The new battery tested good, as expected. The older battery, while still starting the vehicle normally, is near the end of its life in this hot southern climate. The tester identified it as needing replacement, whether I tested it partially discharged or fully charged.The tester can also check the charging and starting system, and you can download test results to a computer for printing. Printing and downloading requires installing software from their website, which I did not do as I do not install unknown software from unknown sources.The tester is powered by the battery under test, there is no internal battery to keep the screen on when disconnected. The problem here is that while the display is okay inside a garage, it is very hard to read outdoors. The white text on a yellow background is nearly impossible to read, and you can’t disconnect it and take it inside to read the results.

This review is for the BT900 Car Battery Tester 6V 12V, 5-3000CCA Battery Load Tester Automotive Alternator Tester. I found this very easy to use and accurate, matching my dealer’s assessment of the battery. I tried the in-car test although you can also choose to test disconnected batteries. Once you connect the leads to the battery, the unit turns on and it is ready to go.. It does not have its own power source. The unit walks you through the test setup step by step. You do not start the vehicle. It prompts you to turn on the headlights for about 10 seconds so you will get an accurate reading. You will enter the test standard and amps as stated on the battery (in my case, EN 500), then the test runs very quickly and displays an overall rating, state of health, state of charge, resistance, amps and voltage (see attached image). Priced currently at $21 with the coupon, it’s a very helpful and smart tool and an excellent value. Recommended.