How to change the battery of a traditional radio?

You mean this radio uses a 3.7 volt battery, right? Now I want to remove the battery and replace the original battery with a charging head.

This problem is easy to solve,

First, take out your original battery and don't put it on it. Very dangerous.

Second, if you connect an IN4007 voltage in series with the positive electrode of the output line of the 5V 1A charging head, you can use it by directly connecting the line to the original two lines of the battery. Make no mistake.

Here is a note. First of all, I don't know how powerful your radio is. If it is very powerful, you should find a charging head with a larger current, such as 5V2A or even larger, and then combine several diodes, or even use a diode with higher power.

By the way, it must be normal for you to operate according to my method. However, the charging head is also a switching power supply, and the power supply is definitely not ideal. At least the radio will be noisy. The sound is not as pure as the original battery If it is the pursuit of sound quality, it is not recommended to do so, if it is just to make him make a sound. A little noise is acceptable. This is possible.