With the advent of mobile phones, the question of quickly recharging the device from the network became relevant. This issue was resolved by the appearance of the "fast charging" function in some phone models. But the issue of charging phones without using the electrical network has not been resolved. When there is a need to go to the lake or just on a hike, the problem with charging the battery of a mobile device is very acute.
It is necessary
Square battery "Planet", metal terminals, connecting wires
Instructions
Step 1
The task is to make one call in the event of unforeseen circumstances, as well as to charge the mobile phone battery. A battery that was popular in Soviet times will come to your aid. It consists of 3 penlight batteries and should provide a voltage of 4.5 volts. In practice, this battery produces as much as 5 volts.
Step 2
The main task in solving this problem is the correct connection of the battery and the phone. You can make a direct connection from the battery to the phone battery, or connect the battery to the phone using a USB cable.
Step 3
When connecting the USB cable, the most important thing is to observe the correct polarity, otherwise charging the battery is not a feasible task. The correct pinout of the contacts is shown in the picture. 1 (+) and 4 (-) contacts are supplying. The black wire belongs to the minus, and the red one to the plus.
Step 4
It remains only to connect all parts of our circuit. It is necessary to put on and fasten the terminals on the bare wires. It is necessary to fasten the terminals on both sides of the bare wires. After fixing the terminals on the wires, it is necessary to connect the battery and the phone battery with connecting wires. When connected properly, the phone screen will display the battery charging.
