Xiaomi Mi Power Bank 2 20000

Advantages: Small size with a capacity of 20,000, honest support for fast charging of both the Power Bank itself and the devices from it. Textured plastic - does not slip out of hand.

Disadvantages: WHITE textured plastic - get your hands dirty almost immediately.

Comment: For its price is almost perfect. A lot of fakes, attach photos how to check the originality of the USB ports.

Advantages: Big.

Disadvantages: Not.

Comment: This situation: I connect the iPhone 5s to the Xiaomi and the charging starts and continues until I lock the screen, after a while in the standby mode, I unlock the iPhone, but it is not charged and does not charge. What is it and what to do, tell me?

Advantages: A huge capacity, 2 days and charged the tablet and phone, so the charge and did not fall less than 50%.

Disadvantages: And can not be.

Comment: Relatively long charge, hours 5-6, but overnight, for the sake of 2-3 days is not a problem.

Advantages: It charges very quickly, even if two devices are connected. The capacity is super.

Disadvantages: Perhaps the weight and dimensions for someone, but the capacity !!!

Comment: Highly recommend. With it, you can forget about the outlet for a week)

Advantages: Power, holds the charge for a long time, quickly charges the gadgets.

Disadvantages: Perhaps for someone it seems heavy. It charges itself long, it all depends on the outlet, voltage and cable.

Comment: Fully satisfied with the purchase.

Advantages: Good bank, declared capacity justifies itself. Included USB-cable, I would like a longer. It is convenient that you can charge the bank itself and the devices from it with the same cord (although in which banks is it not so?).

Disadvantages: It charges for a long time with a standard USB phone adapter (it can reach up to 20 hours), buy something stronger right away, 2 or better for 3 amps, especially the adapter is not supplied.

Comment: In addition, I advise you to buy him a case. Rubber, soft, protects it from damage and the contents of your bags from being damaged by it.

Advantages: Quickly charges.
Nice design, relatively compact.

Disadvantages: I bought the original, the first time I got married. Exchanged, the second time the rules.
White plastic. At first glance, not the most intuitive interface. The same type of indication in one mode indicates a critical error, in the other - the process of charging. This is crazy.

Comment: Enough for three and a half charging the original Redmi 3S (4000 mAh), checked several times.

Advantages: - Real Capacity
- Small and light for 20k
- Fast charging in both directions
- Price

Disadvantages: - USB input only - cannot be charged from round 12 or more volt adapters (oh, there would be Vampirchik-Digi 20k ...)
- Indicators are not very adequate: firstly, they are not linear, and secondly, even if they were linear, 4 gradations per 20k are not enough, well, it would be nice to withdraw current / voltage. Or at least a fast charge indicator.
- Really very poor equipment. Adapter in 220 would not hurt.

Comment: I didn’t really believe in capacity, but I checked it on a [self-made] capacity meter (it discharges 1A).It turned out 19.87Ah@3.7v. Almost always the capacity is indicated at 3.7v, at xiaomi for some reason 3.85. That is, the real capacity is ~ 95.4% of the passport or ~ 99.3% of 20k@3.7v. This is a great result. Most likely, the battery capacity inside is even more than the nominal, because 95.4% of efficiency is a rarity.
Bold plus for this xiaomi.
P.S. Capacity meter, though homemade, but pretty accurate.

Advantages: Minimalist design, compactness, weight (namely weight, taking into account capacity)

Disadvantages: Originally wrote that there is no Quick Chard for charging gadgets. Only for the charge of the bank itself. It is not true. In fact, there are both channels. Just methodically wrong in the experiment. The only, short lace microUSB included.

Comment: I didn’t believe the Chinese figures in the specification and checked it out on a serious wheel (a gadget with a 7Ah battery, a new one, which is important, means the battery has not yet run down). Until the end, the bank did not discharge (harmful to the resource), but according to simple calculations, the capacity of the bank is just about 20 Ah, having in mind the passport Ah batteries of the gadget. So, either on the gadget and on the bank - honest Ah, or on both - equally dishonest.
Not exactly uniform charge indication. The second LED flashes much longer than any other when charging, which, incidentally, is not critical. It is surprising that many complain about weight. What do you think? 20 Ah they are in Africa 20 Ah!
Still. Here, many people write that according to the results of charging gadgets, its real capacity is 12-14 Ah. This is written by those who do not know that only 66% (on average) of the current given by charging to the gadget remain in the battery of the gadget, and the remaining 34% are dissipated in the battery itself and in the charging device of the gadget (there, too, there is a circuit between the socket and battery). And this means that the actual capacity of the device is just the indicated 20 Ah.
In general, I recommend.

Advantages: Design (everything is done, including a box for Apple). Power, the ability to charge two devices. IPhone 6 charges about 7-10 times. Charges fast enough.
There is enough power for charging the ipad for 2-3 charges.

Disadvantages: Large enough and heavy, but for such a powerful battery it is not surprising.

Comment: Overall, this is what I was looking for. Powerful charging, stylish design. I took it for traveling until I discovered major flaws. Let's see how it will work next.