How can you tell if your phone's battery is healthy

I often see the news of fire and the explosion of famous brand mobile phones due to battery failure. How can I judge whether mobile phones are healthy or not?
Batteries are a key component of all digital devices, not just for endurance, but for overall device safety. Then judge the health of mobile phone battery and eliminate the risk of a few tips, a look:

Check battery appearance

First, the easiest way is to look at the battery. If the battery is removable, it is very convenient. If the battery contacts show white or green corrosion marks, this is the initial sign of battery failure. If parts of the battery starts to bulge, be careful not to continue using it.

Of course, the battery aging bulge does not form overnight, if you want to eliminate the problem as soon as possible, you can use the rotation test to find the small bump. The method is simple. Find a horizontal surface such as a tabletop and rotate the battery. If the battery rotates very fast, its surface is already uneven.
Use software to check battery health

For some phones with built-in batteries, the easier way to check is through software. If you use an Android phone, you can enter "*#* *#4636#* *" in the dial interface, then enter the project interface, find the battery information entry, you can see the detailed battery information, including battery health, you can refer to.
If it is an iPhone, you can use some management applications, such as iBackupBot, to check the charging times of the phone, the actual battery capacity, etc. If the total charge loss of a full charge is more than 20% of the original charge, you should consider replacing it (the lithium battery will lose 20% of the charge after 500 recharges).

summary

In addition to the above methods, try to avoid the use of non-original batteries, data lines and chargers, is also effective in preventing the phone from catching fire, explosion. To sum up, as a mobile phone is a kind of anytime electronic device, we still need to pay attention to some details in use as much as possible to avoid the mobile phone becoming a "grenade".