How to make DIY mobile phone charger and power bank using battery box and USB data cable

Although it is rare to encounter a sudden power outage at home in the city, it would be particularly troublesome if there happened to be no power and the phone ran out of power. If you can have a device that uses AA batteries to charge your phone, you don't have to worry about your phone running out of power. And a foreign netizen actually made such a power bank. Let’s see how it is done.

Next, take out a voltage regulator and a battery box, and solder the red wire of the battery box to one of the positive terminals on the left and right ends of the voltage regulator, while the black wire is soldered to the negative terminal in the middle.

Then, solder the black wire of the USB in the same way on the middle end, while the red wire is soldered to the remaining end.

After that, stick the voltage regulator on the bottom of the battery box. The battery power bank is complete.

Finally, install the AA battery, connect the USB port to the phone, and you can easily charge it. How about it? Its pretty good. If you are interested, try making one. Maybe it can be used? If you think it’s good, share it.