It does what you want and doesn't disappoint anywhere. I only regret not getting the model that also has a USB type C port, for the flexibility with cables.

In terms of capacity, it covers multiple charges for a mobile phone and I have also used it as a power supply for a remote surveillance camera, where it lasted about a day and a half.

Excellent construction, it goes without saying that at €15 it is value for money!

It charged normally, but within a few months it started charging quickly and stopped charging in a short period of time. I have it for less than a year

I have it and I've been using it for 16 months, for charging the battery of my 3000mAh phone. Charging this phone from 20% to 95%, 3 full times, and the power bank flashes on the last green dot, meaning it has a few more minutes left. This has been happening since the first day of use until today, which means its capacity hasn't visibly decreased. Surely, it may have slightly decreased, but it's not noticeable. It may appear a bit bulky, but it's not heavy, with an Aluminum casing - it never gets hot. Charging it with a 10W Huawei charger, from 15% to 100%, it lasts about 3 hours and 30 minutes... The conclusions are up to you... Highly recommended, even in February 2021...
Update 25-07-22 = I bought -1 month ago- a second one, in black color - which doesn't have an aluminum casing... Charging the phone and plugging it into an outlet, exactly the same as above... If anything changes, I will come back... WORTH IT...

Charges iPhone 7 plus much faster than its charger, and also helped my LG V10 with its short battery life by charging it on this power bank, giving me almost a full day of normal usage. Perfect!

Owner for over a year, I can only say good things. My phone charges quickly and lasts for 2+ full charges.

Power, durability, and reliability! This power bank has been accompanying me for a long time and everywhere. I mainly use it for my smartphone, MP4 player, and small flashlight. The best value for money.

It charges very quickly and lasts for 4 mobile phone charges. It even has 2 ports for simultaneous charging.

It charges my mobile phones and my iPad quickly. The power bank also charges quickly. High-quality construction. Resistant to falls. Satisfactory size for transportation.

The manual of the power bank states that it is 10000mAh at 3.7V, it also states that at 5V it is 6500mAh.
5V is the basic voltage of a standard USB.
The instructions also state that if you double-click the button, it provides slow charging current for gadgets, without it, the gadgets are at risk of being damaged by fast charging.
Finally, if you connect two devices to charge, the fast charging function stops working.

As an iPhone user, I am not satisfied with this particular product. I believe it is worth spending a little more money to get a better power bank. However, it is beautiful and lightweight.

A reliable, affordable power bank. However, one of the two USB ports had stopped working within 6 months, which has happened to me before with an older Xiaomi power bank.

Very good and fast in charging devices, you want a bag or big pockets in your jacket to have it with you on a daily basis. Overall, it's worth the cost!

After a few tests I did:

First of all, it has fast charging but it is 15w instead of the 18w that modern chargers have. For example, my phone goes from 0-100% in 1 hour and 15 minutes, while with the power bank it took 1 hour and 40 minutes. It didn't bother me much, I just mention it.

In the user manual it says "rated capacity 6500mAh" as some people mentioned in the comments here, but it charged my phone (2900mAh rated capacity) 3.5 times, which is equivalent to about 10000mAh, so I can't say that the 'real' capacity is 6500mAh. Additionally, it charged from 0-100% in 3 hours and 20 minutes.

It has a very nice aluminum construction, it is quite small with an expected weight. I really can't ask for anything more for its price. Highly recommended.

For a power bank, it is very good. I charge it and it has a nice design on the outside. The battery lasts a long time, it is complete for this price

It comfortably charges 3 mobile phones without needing to recharge it (depending, of course, on the phones). It is not very bulky and you can carry it because it is not very heavy. It is worth its money and it is worth getting it.

Everything is perfect... Number one at this price, the only issue is that it is a bit heavy and takes a while to fully charge, but it is understandable since it has a capacity of 20000mAh. I highly recommend it.

I have had this power bank for about 2 months. The build quality is very good. The only relatively negative thing is the power on/off button, which is not stable and does not have a very good feel. The weight and size are also negative, as it feels like having a large phone. The positives are the two ports that provide quick charge, the short cable included in the package that does its job well and is not frayed. As for the battery life, I have to say that it charges my 3100 mAh phone 2.5 times, as I am on the go and using it simultaneously. The charging time, with a regular charger from zero to 100, takes about 5 hours.

Definitely worth its money. It does what it says. In terms of size, it is like a thick mobile phone, similar to the 2C in dimensions but slightly thinner. And because many people ask about the weight, it weighs 140gr while the 2C weighs 260gr. It can do approximately 1.5-2 charges for the mi A3 4030 mAh. With a good charger, it charges in 4 hours

Convenient size, as small as a 5-inch mobile phone, charges the mobile phone quickly, 2 ports that are convenient for charging 2 devices simultaneously. It takes a little longer to charge. Value for money

I bought it in the summer to have it on vacation. It is quite lightweight and practical and relatively small in size. For the 14 euros I bought it, it is an ideal choice for a power bank of this category.

Very good power bank. It is the third one I generally use and it is the best so far. I can charge it twice. Ideal for traveling. You don't have to worry about finding a socket and it is also quite high quality. I recommend it

Since most mobile phones now have a USB-C charging port, this particular power bank only has a micro USB port, so you will need to purchase the Xiaomi Regular USB (available here on Skroutz) in order to not need another cable to charge the power bank and another one for the mobile phone

I bought two for €15 each.
There is no better and cheaper solution.
It has two USB ports, which allows you to charge 2 devices simultaneously if you have a second cable, of course.
It takes a little longer to fully charge, but personally, it doesn't bother me because I charge it when I don't need it. Also, I want to be present during its charging because batteries are something that requires attention. (Don't explode or catch fire)
An essential, affordable, and quality solution for someone who is away from home for many hours due to work.

It fully covers me and is worth its money!
The only difference is that in the specifications it is mentioned Li-Po battery, while it is Li-Ion.

5* is a small "beast" that charges my phone and Bluetooth headphones quickly. It's worth its money! For the xiaomi mi a2 lite phone, it provides 2 to 3 charges! Excellent!

For now, it is perfect. Not only does it charge the phone quite quickly, but it also stays quite cool.

Of course, depending on the charger, it takes a while to fully charge it. But hey, it's 10,000 mAh.

Charges a mobile phone with a 4000 mAh battery (Xiaomi Note 6 Pro) about one and a half times. Other than that, I don't have any issues. Also, I didn't have a point of comparison with another power bank.

With the fast charge charger, it charges in about 3.5 hours. It can charge a 3200mAh mobile battery from 20-90% in just over 1 hour, and for 3 times. Excellent.

From the beginning, the port for charging the power bank does not fit correctly. They have installed it upside down and it does not have good build quality. It is very slow in charging. It takes 7 hours to charge. Other than that, it is good. It charges devices quickly, holds its charge, has a normal weight and size, and charges my phone twice (4050 mAh).

Daily use on vacations. at the beach - room. It charges the mobile (Xiaomi Redmi Note 4) and the GoPro Hero 7 quite quickly. To the point that, even when I was in the room where I had electricity, I preferred to charge the mobile with the power bank because it charged faster. The charging of the power bank itself will be checked again because I don't remember with which charger I had charged it when I checked it for the first time (during the vacation I didn't wait for it to fully discharge in order to charge it, so it doesn't make sense to write something about those charges).

Overall, very satisfied with the purchase of the device. Get the 20,000mAh one for even more convenience.