Would recommend to any professional technician looking for an accurate battery tester.

Tested three of them and it correctly identified the bad battery

I tested a 2-month old battery in the vehicle fully charged and it failed.

With marine 12V deepcyle batteries if they are discharged for example 5V it will test it as bad replace battery instead of recharge and retest

Great inexpensive battery tool.

The battery still works fine but is about 30-40% down on CCA.On first test it informed me that the surface charge had to be depleted

He Had another bad battery that was replaced, tested and this tester said it was good

great battery tester, the on board menue makes it very easy to use

It lets you know if the battery, alternator, or starter are the problem.

Figured I must have had a bad battery.

Its a great battery tester

I found that I have some bad batteries and

Easy to Check your battery before it dies on a cold winter day.

Even though i haven't found any bad batteries yet, i feel more confident with this battery tester than the more expensive one that's in our shop because i would always get inconsistent results with the shop tester that was priced around $1000.00 dollars

It correctly identified a bad battery which I suspected was failing

Used it to confirm an auto shop's diagnosis of a bad battery

The brand new battery failed the test as well!

The brand new battery failed the test as well!

I'm confident both batteries are fine.

I like the ease of use and the tester did diagnose a bad battery that I was having problems with