NEO928 @ 25.11.20, 11:20

Tagir140, these are ready-made solutions for those who have a bunch of free lithium batteries. And yes, this solution with batteries (if you buy them) will be more expensive. But on the choice: you want to buy finished chalk, you want to collect from the details. For each of these options there are many supporters)
Hello, I would add that home-made PB is also created under your claims, which are simply not available in nature. Decision of course expensive, but it is worth it, because Some new properties of the board are found, which did not suspect before. In particular, I modified the charge from the cigarette lighter. The source scheme on 500mA transistors. Forced to 2a, it works, but long-term work on this mode leads to overheating of the output transistor. I installed the radiator, you can now charge 1a and briefly up to 2A from the cigarette lighter. Simulated the charge process of a small-sized PB from this bitterness. PB discharged to a cut-off for experience. At first, the current was 1,3a at a voltage of 4.85V. The tension of the county as heated began to decrease slightly and stopped at 4.71. The charge current began to smoothly decrease far from synchronously with a decrease in voltage and at the end reached 0.71a and remained so almost until the end of the PB charge, then at the end of the charge fell as usual. It means that some kind of software PB monitors extremely low voltage developed by a specific source (in this case by the county) and adjusts the charge current into the balance with this minimum voltage. On the usual network of 5V, the charge current is installed immediately, 1,5A, on the samsung - 1,9a, and remains constant to a decrease before the charge ending in the usual manner. On the PB display, the voltage and current are also displayed. Accurate control over a successively USB test. With respect.
Post has been editedpersey.a - 24.12.20, 10:11