Installed in a robotic vacuum
Installed in 2021 and operated for 1:20 minutes
They worked for 3 months
The vacuum went into idle mode.
The vacuum is operating again without any charging in between, I should emphasize, in 2024.. I was shocked!!! I did not expect it.
And until today they are working perfectly with a small drop of about 35%. June 2026
Of course, I will use these again

1850 to 1950mAh, that is what I received. It is not 2500mAh. The durability in use will be seen in the future.

Great caution with counterfeits. Samsung provides its authentic batteries as shown in the photo, without stickers and without any company box. If you received it with stickers, boxes, etc., it is most likely not original. The retail price of the authentic one is about 5 euros. The lower the price drops below 5, the higher the chance you will receive a non-authentic one.

Measured from 2200 to 2350. Much better compared to the Chinese ones that promise whatever and aren't even 1000

The negative reviews I read are obviously about batteries that say SAMSUNG but are actually half-empty knock-offs. If you buy from a store that sells only batteries, you will get 2560mAh, on a smart charger OPUS BT-C3100. (It discharged them down to 3V).

Very good battery and it is indeed Samsung. I repaired the pack of an expensive portable device and it works perfectly so far.

Very good, especially for their price, I have already bought them 3 times (23 batteries in total). I have put them in a Black & Decker Pivot 18V vacuum, in 2 drills, and in a rechargeable chainsaw. For example, the vacuum became more powerful than before and now lasts over 15 minutes. None of them were defective. The packaging is also very good, each one in a separate cardboard box and additionally in a plastic protective case.

It's definitely not Samsung. One of them came to me at 1.02 volts... I should have just bought the cheaper ones; I think they wouldn't have made a difference.

They were placed in a rechargeable AEG CX8 vacuum cleaner. Everything is perfect!!!! It became better than new... it lasts longer!+++++

I bought 5 pieces, all measured at 1300mah, half the capacity of what is stated.
Trash... get something better.

I have taken three (3), all charge normally and work just fine in light with a detector as well as a flashlight.

I replaced the batteries in an 8-year-old Bosch screwdriver and it became like new! Its performance is now like when it was first purchased! Be careful with the betting!

Quite a good battery, given its price.
Purchased to replace worn-out ones, for use in a small ups.
Until today, it has not shown signs of fatigue. Value for money.

I have used it on a professional tool hilte I have put 12 inside the battery and I have been amazed by it.

I bought 2 pieces to use one in the BOSCH IXO electric screwdriver and have the other as a spare. In the end, it's a joke!! It does work with the screwdriver, but as soon as you try to screw something, it gets stuck as if you put it on an incline!! It stops and it's not worth it.. such a waste of money.

I bought 2 2500mah Samsung batteries from the store for a large remote-controlled helicopter. Flight duration is 12 minutes, I am very satisfied, no issues. Good quality.

I bought ten and put them in solar lights. After five days, three of them stopped charging. I assumed it was the lights and swapped them around, but nothing. The rest are working fine.

I used them for the robot vacuum cleaner and they don't even provide half the cleaning compared to the original battery... also, they discharge abruptly, resulting in the vacuum not being able to return to the base to recharge... they might be suitable for light use... their capacity was about 1800mAh when I bought them. Update: after 5 days of use, the vacuum can't even start the cleaning process

I bought 3 pieces. The first one has a capacity of 800mA, the second one 980μA, and the third one 1900. So, neither do they have the correct capacity nor stable quality

Initially, I did not measure each one separately, as I put them all together in a solar panel that outputs 12 or 5V. The truth is that there is a sticker next to the printed information and a small paper sticker that is supposed to have the characteristics of each battery and packaged in a cardboard box, also with a paper sticker. Eventually, I had to measure them because as soon as it got dark, the camera stopped working.... So, after a full charge, 6 out of 8 have 1603-1610mAh and the other 2 only have 1015mAh. Chinese... What a shame

After two charges, their maximum capacity is somewhere around 1670 mAh.
After 15 charges and a period of about 40 days, the maximum capacity dropped to 1546mAh

They were purchased for use in an electric screwdriver.
In a test charge-discharge, the capacity
is what you see in the photo... about 1700mAh
no relation to the stated... nevertheless, because
I got them for only 2.90€ each, I accept it.
As long as they last at least for a while...

They were purchased from a store for 3€. They came in a plastic box, one battery at a time. Weight 48g, the same as the genuine ones, internal resistance 31 mohm which should have been below 18, and capacity not even 1770mAh. I didn't expect to get Samsung 25r for 3 euros, but now it's too late. For me, anyone who wants to be sure should ask to see them up close before buying them. Avoid batteries in plastic boxes, stickers, and various strange things on the battery, etc.

I bought them because I was building a battery for an electric bicycle. They were the first model I made and they "took a lot of beating". After frequent discharges and recharges, exposure to high temperatures, and some minor impacts, they managed to withstand and not explode as one would expect.

The downside is that they do not have the greatest autonomy and discharge rate. If you are looking for batteries for a more "extreme" application, I would recommend looking at the more expensive options.

Finally, honest batteries. I bought three, tested them both in discharge and charge. 2,000 mAh is a surprise compared to what you generally receive when you buy batteries. They are Flat top, come in a box, and even the weight shows that they are good. See photo. I ordered seven more from the same store.

Exactly one year later, the batteries, with moderate use, started leaking, rusted, and destroyed a lens worth 30 euros. Unacceptable. The same batteries I ordered from China haven't had any issues.

I actually got 2 pieces with 2480mAh!
2 out of 2, so I am very satisfied.
For a flashlight that I need them for, they are very good. I haven't tried them on an electronic cigarette.

I bought 2 for the e-cigarette.. One was charged at 45% and the other at 10%. After the first charge to 100%, one seems to lose its charge faster by 10% difference, so I consider it problematic... I haven't tried them in action to see what performance they have, but I don't expect much... It's better to spend more money to buy another one.

Just did the first charge with a charger for this specific battery and it simply never worked.... While I wasted my money