Plastic construction, don't expect anything superior in quality. It can also measure the capacity of each battery; on the back it shows accordingly when the batteries are very low or full, there is a chart.

It's a joke, it shows random values compared to a precision multimeter. A 1.20v battery is shown as 1.45v. Another is shown as 1.47v while it has 1.35v. Another 1.40 while it has 1.24v. Finally, a dead battery is shown as 1.21v

It does its job.
Cheap construction so no sudden movements because the wires inside don't have durable soldering.
Other than that, it's a fine device.

Now, for the price it's worth it but not from here.
In the Chinese store it's the same price or even cheaper and without the 3 euro shipping fee, which shouldn't exist for orders under ten euros.

You always have to keep the instructions because who can remember what the numbers mean. It would be better if the machine itself indicated: full? Low, empty

Chinese situation, the low build quality is evident but it does its job just fine, loses one star due to quality

Exactly as shown in the photo and described. Medium quality, however it provides relatively accurate measurements depending on the condition of the battery, which were confirmed with a multimeter. Of course, it was not made to replace the multimeter in any case, but it is perfect for a quick identification of the battery's condition without having to use one. As for its price (€2.21), there's nothing to discuss... hence the 5 stars only

Unfortunately, I also had an issue with the screen, you can't see any indication. It may have just been defective, the one I received, but for 2.5 euros I didn't bother further.

So far very good. It has solved my problems. Batteries that would be thrown away are used until they are exhausted.

Very practical for checking small batteries of various remote controls or toys, etc.
Easy to use.
Good measurement accuracy.
Works with the power of the measured battery, no external source needed.

I added it to the cart to reach the amount for free shipping.
And it turned out to be more useful than the main product I had ordered.
It has paid for itself just from batteries that I saved since they still had good energy and I was about to throw them away.
It counts that I have tried even 12v.
And the long 18650s.
Just what you need for flashlights, electronic cigarettes, controllers, car keys, garage door openers.
Some have reported that it stops working after a while.
The reason is a little wire that comes loose inside. There is a repair tutorial circulating in a video on the internet.
The next model that is available does not show the battery current in real-time, so get this one.
Must have!

Unfortunately, I did not have a good experience. I bought the first one and it worked quite well, but suddenly it wouldn't turn on... I bought 2 more, and one had a screen issue from the start, it didn't display clearly... they replaced it for me, and recently I see that the second one is also starting to not display well. It's an economical solution for checking batteries, but I probably got a defective batch.

Excellent tool for checking the charge of batteries, essential for anyone who uses the batteries it checks

It does its job just fine. Before sending the batteries for recycling, it is good to check them.

It is a decent product for the money it costs, but it has a fairly cheap construction. It does not secure the battery in place, so many times they do not make contact and appear empty. Also, the indications for where the positive and negative poles of the battery go are not clear enough. It ultimately gets the job done, but I would recommend looking into another solution.

It's great! Easy to use and reliable (as much as such a product can be). It's worth its money!

Average build quality.. Does its job just fine.. Doesn't need an extra battery.. Works with the one it comes with.. If it's empty, it doesn't show any indication.. I don't think it will ever break, unless you step on it or throw it down with force..

With the same battery, one lights up and one does not light up - cheap construction that gives you the feeling of even more unreliability. I do not recommend it!

A very important tool that will help you a lot. You will be able to see the condition of your batteries. Very user-friendly.

It does what it promises with "relative" accuracy in voltage measurement. The build quality is not that good. For its price, it is very good

Very convenient, easy to use, and reliable. Easily and quickly know when a battery is usable or for recycling.

Nice, it doesn't need its own battery to work, as it only requires power from the batteries it measures.
Update: After about a year, the screen seems to have short-circuited, so you can barely read what it says.

The indications are in volts and on the back you can read from how many volts and below the battery needs to be changed that you measure.... It seems serious

It's a joke!! I measured approximately 12 batteries one by one and I was disappointed!! The same battery, at the same time, in 3 measurements....3 different readings with a huge difference!! Choose! The readings compared to a professional multimeter...day and night!!! I threw it away, 3 euros wasted!!

Very useful little device, everything is good. It saved me a lot of time from having to take out the multimeter every now and then.

Economical, reliable, fast. Its economical price is reflected in the cheap construction materials. However, it does its job exceptionally well.

Very good meter. Its big advantage is that it operates with the power of the tested batteries.

For its price, it is very good. However, as other buyers have noted, the battery compartment is inconvenient to use since there is no suitable case to secure them, making it difficult for some of them to stabilize for measurement. For something basic, it is fine.

Cheap and useful for emptying the full ones when you have a bunch of batteries at home.

Simple and functional! Sometimes it takes a while to give a signal because the ends of the accumulators do not make good contact, but it's a minor issue! For someone who doesn't have specialized requirements, it's fine.

It does what it promises with "relative" accuracy in measuring voltage (the tested battery was also measured with a multimeter). The build quality is not so good, but its price is so low that it justifies it. The battery compartment is a bit inconvenient as it does not have a holder to secure them. Among its positives are the many different sizes of batteries supported. Overall, it is recommended for simple battery checks, as the quality-price ratio is very good.