Dlyfull Battery Tester, LCD Display Universal Battery Checker for Ni-MH, Ni-CD, Li-ion, Alk & LiFe04 Batteries(AA AAA C D 9V 12V 18650 CR123A 2CR5 CR2032 Cells), 2X AAA Batteries Included

Wanted a tester to check our security camera battery’s and this one does it. CR123 A and so many more sizes it checks in digital display. When you check the button cell battery you don’t need to use the probe. You just hold it on the top at the correct location for the button cell your checking. As already saved us money on the security batteries CR123 A for only replacing the ones under 50 % before we would throw away and replace all 4 batteries in each camera. Highly recommend this battery tester.

The large LCD display is easy on my old eyes without chasing down reader glasses. Smartly engineered so it stays in place during testing sessions, but compact and light enough to stow away easily. The coiled hide-away wand is a clever solution for managing the test lead wire — beats the tangle of alligator clip wire leads I always had wrapped around my previous tester. Two inexpensive AAA batteries power this tester vs. the pricey pair of less commonly available button batteries that my old tester used insures much longer and more economical juice life. Easier for my shaky old fumble fingers to install too.

I have not had an opportunity to use the battery tester extensively. But I approve of what i have seen thus far. It appears to be a very simple and productive way of testing a lot of batteries. Many devices that use two batteries need those batteries to be very close in voltage. This battery tester accomplishes that. I recommend that others take a close look at this unit. I heartily recommend it.

This product works great! Tests so many different batteries! Probably saved me a lot of money. I had thrown away some batteries that were still good. I had been changing my batteries in my atomic clocks every six months. When I checked the ones I had discarded, they still had 90-95 per cent life left! I will certainly test them before I discard them now! I did not have to wait long for this to be shipped to me. I was very satisfied!

The first one I received produced wildly inaccurate readings for each NiMH battery I tested. The replacement was just as bad as the first one. When I test the same battery five or six times in a row, each reading was different. From reading to reading I would get: 1.20 V, 1.16 V, 0.96 V, 1.05 V, 1.10 V. I used a high-quality digital voltmeter to check the same battery and got 1.26 V every reading. I tried testing the battery with the voltmeter in parallel with the battery tester, again the voltmeter would read 1.26 V every time and the battery tester would be all over the place. I did try testing some alkaline batteries using the alkaline terminal, those readings were more consistent and only slightly lower than the voltmeter. Trying a few other battery chemistries, it seems the problem is mostly with accurately measuring NiMH batteries. For a device like this to be useful it needs to achieve two goals: one accurately read the voltage and two repeat the same reading each measurement. Both devices that I tested did neither.

This is a very unique item. It checks all sizes of batteries. Not too big to fit in a drawer, yet big enough to hold in one's hands. :-)

So far this tester has been able to test every battery I tried. It seems to quite accurate. It has a battery of its own and has a self-test button to test that battery.

Functions okay- but incredibly difficult to read and utilize. Little contrast, ,zbelling raised-black-on-black, various battery types and sizes strangely grouped: Try to locate the test spot for a small 1.5V zinc oxide cell .... Price is fair, but far less usable than, say, any of the ZTS family.Tossed it in the trash, didn't even feel like returning it.