Dlyfull Battery Tester for AA AAA C D 9V, Button Cell & Household Batteries

Hello! I've been using this battery tester for about a month, and it works really well. It was very easy to set up. Just take it out of the box, put in the included battery, and it's ready to use. To test a battery, just place it in the tester, and the screen instantly tells you if it's Poor, Weak, or Good (Excellent). The display is easy to read, and you get the results right away. I've used it on several different types of batteries, including rechargeable ones, and it has worked great every time. I've also compared this battery tester with another one just to check its accuracy, and the results were the same. It appears to be very accurate. Overall, this is a simple, useful tool that does exactly what it's supposed to do. I'm pretty happy with my purchase!

It works as advertised. So easy to use and test every battery.

Works very well had several different types of batteries laying around didn't know if they were good or bad. I went through and sorted them and very quickly out found out if they were good or bad. Seems like a good value for the money as I would have typically just throwing the batteries away since I didn't know if I could trust them or not. It holds or tests many types of batteries which is nice. It is compact and handheld and is very practical seems pretty durable too.

It seems easy enough to use. Markings for + and - and for the various button cell batteries are not so easy to read. Not sure why it must have a battery itself to work. Bottom line, it gets the job done.

After a recent move, my small battery tester gave up the ghost. I find these things to be very useful and being without one while decorating for Christmas was not optimal. For my battery-operated lights, I had to go through my battery drawer pulling out batteries and trying to find combinations (the lights require two or three AA each) that would work. Sometimes one of two batteries would be ok. Sometimes one of three was bad and prevented the other two from powering the lights. In fact, it was so tedious I went out and bought a giant pack of AA batteries at the local hardware store. When this device came in I immediately went back to the battery drawer and tested all of the remaining ones. Several had to be discarded because of either no charge or borderline. I've found that LEDs do not like batteries that do not deliver the full charge and all my Christmas lights are LEDs. As a plus, I had a bunch of older button batteries that, surprisingly, still hold a very good charge. I was thinking of pitching them, but now all I have to do is figure out what device I put them in. What I like about this device is that it tests a very wide range of batteries: your usual-suspect C, D, AA, AAA, and 9v of course. Also most 1.5v button batteries and even 3v button batteries; though larger ones like a CR2450 won't fit into one of the button sockets on the tester, you can check them by holding against the contacts on the 3v button slot. It also tests a range of the 3v cylindrical batteries used in my home security system. Nice. It even comes with a AAA battery to power the tester. Also nice. All-in-all a fine little device and well worth getting

Standard testers aren’t really designed to test button batteries, and give inaccurate results when used. This tester is great for all sizes of batteries from buttons to d cells. Have an Apple AirTag and want to make sure the battery is good before you leave on vacation? Just drop it in and see how good it is!

Works perfectly and covers just about every battery I use.

It works great. The last one I purchased was a cheap manual battery tester that if you didn’t put the battery in just right it didn’t give always give the correct results. This one operates with batteries making testing your batteries quick and easy.

It does the job. Seems good value for money.

A superb little unit, so easy to use. Tells you exactly how much charge is left in the battery in seconds, Test all the batteries you have, even those little awkward watch and clock batteries.

Extremely useful item

Really easy to use and see the results

Great little item. It saves having old batteries lying around the house not knowing if they are actually out of power. After testing a lot of batteries I found some of them were full and a few still had some power left in them.