Battery Tester, Dlyfull LCD Display Universal Battery Checker for AA AAA C D 9V CR2032 CR123A CR2 CRV3 2CR5 CRP2 1.5V/3V Button Cell Batteries, 1x AAA batteries included

This battery tester can be used to test a variety of batteries easily. The unit may be small but is functional, easy to use, good cost, and works well. The results of the test are easy to read.

Awesome little tester! I can’t tell you how many batteries I’ve probably tossed out without knowing if they were actually dead. This tester is a game-changer! It’s super easy to use, works with multiple battery sizes, and the display is clear and easy to read. It’s a handy little tool that takes the guesswork out of battery life. Highly recommend!

My only criticism is that polarity markers could be easier to see.

If you're like me and have batteries in the house and have no idea if they're good or not, you NEED this. At first I wasn't sure if this was going to work, but it does. I've tried multiple batteries, it really works. Batteries I would've just thrown out not knowing if they've still got juice or not? Those days are gone. It reads really well, and it's a compact and mobile gadget, so you can put it on a shelf to come back to it later. And it's not expensive, so it was a great buy for me. Very happy.

Small, easy to use and works just fine.

Okay, let me start by saying I'm not a scientist. I'm not into whether this tester is "under load" or "over load" or whatever those terms may mean. I know that amount of precision is important for some people. Understood.For me and what I do know is that this tester gave results that I expected. For batteries that I knew weren't working (because the flashlight or other item wasn't working), this tester indicated those batteries were DEAD. For new batteries that should be GOOD with a full charge, this tester showed GOOD/FULLY CHARGED every time. For some batteries that have been used in items for a while, the tester showed WEAK, or slightly less than full. To be expected. I tested batteries from Amazon and other retailers. Duracell, Energizer, etc. If the batteries were supposed to be new, this tester showed they were. If they were corroded, had been used for a long time, or were well past the use-by-date, the tester showed WEAK or DEAD.That's what I wanted. I did look at some of the testers that were in the under $10 range. I didn't like the way you had to hold button cell and CR2032 batteries to test them. They easily slid out of those testers if you didn't hold them just right. So, I spent around double the price for this tester using it to test literally every size of battery I had from 9V down to the smallest button coin batteries. I had over 20 LR44 and LR1154 batteries I use in my bike computers. This tester quickly showed me the weak batteries and the good batteries. I knew what they probably were based upon use and the date on the package. But this tester verified those readings.I also had some loose batteries that I literally did not know if they were good or bad. I put every one of those in the tester and wind up with many dead batteries, some okay ones, and many good ones. It was easy to toss out the ones that I couldn't trust in the future using this tester.I gave the tester 5 stars. If it lasts, it's worth 10 stars. Unless you need scientific precision using load/no load factors, this tester is awesome in my opinion. I will buy a second one to have when I invariably can't find this one. Highly recommended.

Works like a charm. Instead of using a volt meter with wired probes that I keep in my basement workshop I have this handy gizmo tucked into a draw upstairs along with some of the batteries. Everything requires batteries these days and the only way to buy them cheaply is in large packages. Loose batteries, are they good or not? Now I can quickly tell.

I needed this simple battery tester. Very convenient to use.