All batteries used in mobile devices have contacts on the edge. Using them, the charging process is performed.
The article deals with the questions: what are each of the contacts responsible for and how does the power of a three-pin battery differ from a four-pin battery. It is considered what function they perform, how they help to function better.
Why 3 pins on the phone battery
Depending on the power scheme, a certain number of connectors are created. Two, three or four. Which are left and right indicate + and -, which determines a positive, negative power output. The third, middle contact, is present on the battery as a source of transmission of service information, which includes: state of charge, temperature and other useful data.
The temperature is controlled by a sensor built into the battery. Over charge controller control. The sensor monitors the temperature during the charging process.
It transmits information about the charge in percent, turns off in case of overcharge or overdischarge. The process allows you to extend the life of the device, which allows you not to spend money on a new battery. An urgent issue for owners who have a non-removable battery.
In “smart” smartphones, the third contact transmits information about the technical characteristics: serial number, information about the phone, the manufacturer, and so on.
Important! It is li-ion batteries for mobile devices that are equipped with a third connector, for the reasons described above.
Why 4 pins on the phone battery
If on three-pin batteries the third (middle) terminal is responsible for monitoring temperature, overcharging, and transferring service information, then the fourth terminal may take over some of the functions of the third contact, as on similar phones.
Important! In this case, it is impossible to answer exactly what the third connector is specifically responsible for, and for which the fourth. Charger manufacturers are not promoting this issue.
On mobile devices 4, a contact can play a protective role when it is not inserted into a “native” device. The charging process will not occur, because the information transmitted through this contact will not match the one used in the “real” device.
For example, you have a Samsung phone. And you cannot find a battery of the same brand to it. Look for an analog that fits. Perhaps it has a similar arrangement of batteries, as well as a licensed brand battery.
After reading the article, it becomes clear that the third and fourth contact on the battery of a mobile device plays an important role. Helps protect against overcharge and overdischarge. Resets information to the processor. It extends the life of the phone, which is important in everyday life, when without a smartphone it’s even uncomfortable to go out.
The performance is completely dependent on the charge, so it is so important to know why all the connectors presented on the battery are used. Useful when you need to deal with charging another device.
Still have questions about contacts on the phone battery or have something to add? Then write to us about it in the comments, this will make the material more useful, complete and accurate.
