For starters, a little about the battery itself, for those who suddenly did not read about replacing it in my last article Using a USB tester, I filmed the process of charging a dying stock battery with a capacity of 3600mAh (trusting the labeling and my measurement by another tester mentioned in the last article): In this post, I will by no means review the USB tester itself (God forbid, this stuff is full on the network), but in practice, with its help and with the help of Imax B6, I will try to decide whether its readings are enough, namely along the 5V line and converted into a capacity for a charge or direct measurement from a battery bank for a discharge – is it inevitable and always mandatory? and in general I’ll try to decide whether this device has a place to be, or is its use even in domestic conditions completely unacceptable? You draw conclusions in the comments what the USB tester actually showed, why the Imax-B6 showed something different and how you can now live with it calmly or not. The voltage of the factory precharge for a year in the refrigerator has not dropped a single drop, as it was 3.87V and it remains so: Disassembly does not bring surprises, here, as before, there is a protection board the size of one of two cans paired together and the wires connecting them in parallel: Dismantling a smartphone and an old, but original battery Cutting off with heating an old, no longer efficient battery with a plastic card: Voltages after discharging with “imax” up to 3.35V and “rest” for a couple of hours are almost identical, which is very pleasing: Next, soldering the boards protection, in particular from the old battery: and preparing a new can for the old controller: packaging and insulating a newly made battery and gluing double-sided tape on the case: well, the assembly of the smartphone itself before turning it on In general, my fart was bombed a little then and I decided next time to document it “on camera” the whole process of replacing with a new one that has been stored for about a year on the door in the refrigerator. Let’s start with the background. Many years ago, I bought a USB tester and always used it to take some readings related to the USB port. Hello everyone.

USB Safety Tester J7-t – useless? or help identify a dying battery?

The test subject will be the same “HEXUNBABA”, the photo report “before” and “after” is under the cut. The testing technique, in short, looks like this: To understand the process of charging in a smartphone, I inform you that the smartphone turns off when it drops to 3.4V, and the charge continues until 4.35V is reached at the terminals of the bank I take measurements with a USB tester of the old and new (after rework) batteries in the smartphone, then I remove both batteries from the smartphone and after several charge / discharge cycles using Imax- B6, I measure the capacity several times with it when charging and discharging. During this time, the apparatus helped out more than one hundred times, and sometimes even allowed me to do without bulky, not very convenient, additional measuring and charging equipment: on the back there are some important characteristics of the device And now the time has come, the old battery began to breathe heavily. But I had the imprudence to print a post on replacing the battery and even give a subjective assessment of the quality of the latter, relying only on the testimony of this USB tester … and the experts came to the comments – “scold me”)

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