Prehistory
Having read on Habré about the goodwill of the notorious company
Mugen Power , as I think many others, I decided to try my luck, as they say, hoping for a chance. And after a week I found time to sit down with a translator and work hard to write a less tolerable letter to this company. True, they didn’t answer me soon, but in pure Russian (which made me happy), and after a couple of days of correspondence I was informed that the order was made and will be sent soon. True, I had to wait a long time (thanks to one organization that deals with this in our country). But when hope began to melt slowly, and the holiday was approaching, I finally got my desired battery for the old
Dell Streak 5 with a capacity of 4,800 mA / h (in the title I rounded up for beauty, see more
here ).

As it is not surprising, the kindness of the Chinese did not end only on the battery, and two covers went in the kit at once.
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Unfortunately, there was no photo of the package left; I had to make a gene after the arrival. cleaning, but I will say that this is a standard package of transparent plastic, in appearance resembles the packaging from flash drives.
Having unpacked and turned the battery in hand, the manufacturer’s resourcefulness caused surprise, namely the shape of the battery itself.

as seen in the photo, it looks like a standard battery, to which the elder brother was added “surgically”, but this ingenuity could not end because of the presence in Dell Streak of the cover opening sensor realized by closing the circuit with a standard cover (which is made of metal) .
Mugen is also pleased

red marked those same contacts.
But, unfortunately, as elsewhere, there is also a minus, the plastic from which the lid is made entirely, including the latches, is not very durable and after the first fall of these:

in such:

that in the end in the collection does not look very attractive

But as you understand, there are more advantages, all the same, and I’ll add to them in the piggy bank that in a standard case, like this,

the phone, though not entirely free, enters without consequences:

On this background, and perhaps ends.
Journey itself
As a person who will once again be safe, I took with me into the train and the stock battery charged, as they say, “I don’t want to,” but I soon realized that it was superfluous. So, I had to go on the train for 2 days and at that time I wanted to entertain myself somehow and not only as far as possible, so before leaving I was bothering to download more movies and books. The first day passed quite calmly using 3G and reading books, on the second day 4 films lasting from 1 to 2 hours were watched and, what struck me, the device after that ate only 40% of the charge (as standard the film), as it turned out, the dignity did not end there, since I had been on the Internet all evening and one at night and had time to read a 500-page book during the trip. Fortunately, arriving at the place of rest (and this is half an hour by car) and sorting things out, I pressed the power button and saw the joyful screen of the graphic key (then I first thought something like “THIS IS YES!”), As the green robot showed, about 23% more, but just in case I decided to charge it all the same. In my daily rest, I didn’t really care about charging because I was driving around on various excursion routes, of course, after three days of very active use of 3G, he still gave up. After a week of rest in the south of Russia, but far from the sea, a collective meeting with the host side sent us to the sea accompanied by a car, and then I got the idea to check the lifetime in navigator mode. For this, I downloaded Yandex navigator and we went. The journey took 10 hours and during that time I got used to the monotonous “Oksana” mumbling, which showed the way, on arrival my old man showed 20% of the charge. Perhaps the way back was easier for Dell, because it discussed past trips and planned vacations. In which I probably will take with me a phone only with a battery of increased capacity.
Conclusion
Despite the rigorous mathematics, the device works more than three times longer. The only weak point is the fragile plastic from which the covers are made. With a price of about 4,000 rubles. he completely discourages the money spent.
PS I thank the company
Mugen Power for providing the battery.
PSS Many thanks to the user
kraleksandr , who did the Titanic work, and even at one in the morning, showed me the mistakes. By the way, the links were corrected for the Russian-language site, and a link was added directly to the battery itself.