This tester is very good, it seems solid and I think it will serve me very long. Very practical to test all kinds of batteries lying around the house. The display seems to me reliable and accurate because after testing the same stack successively, the result remains the same. (Display of voltage, and the wear percentage). If we had to find a fault, I would say it is a little imposing.
Little indication to test the batteries included in the device, you must hold down at least 3 seconds on "self test", otherwise it does not. Just for batteries, keep in touch at least 3 seconds.
In short, a very good investment in the long term. Excellent price / quality ratio.
