With our busy daily lives, it is certainly not possible to keep an eye on your phone every time you want to charge it with a power bank. At some point you leave the phone connected to a power bank even if it is full. Some people have asked in the comments if a phone battery can boil over as a result of charging a power bank for too long. We decided it was time to investigate whether it's safe to leave a phone plugged in when it's fully charged.
Battery degradation
The reason some people are concerned about leaving their battery connected to a power bank is because of the batteries. Yes, batteries, our favorite topic. To keep you informed, phones use lithium batteries, which are made partly from an electrolyte solution. We have previously divided it intothis blog post about lithium-ion batteriesBut in short, when your battery's electrodes are connected to a circuit, the electrolyte is forced to transform. The solution slowly begins to change, forcing electrons through the circuit, and when connected to a device, a charge is created. However, they are electrolytesextremely flammable and also sensitive to temperature. The myth that batteries can 'boil over' stems from the fact that the battery becomes too hot when it can no longer store a charge. This has also raised other concerns, such as "is it safe to leave a phone charger plugged in?" And "Is it safe to leave a phone charging overnight?“However, the idea that a battery 'boils over' is incorrect for one reason: protection against overcharging.
Overload protection
The idea of a battery deteriorating significantly due to overchargingwas viable years ago. This, howeverdoes not apply to modern devices and power banks, at least if you use the right one.
Feature of high-quality power banksprotection against overload.This is a kind of technology that protects your phone's battery from overcharging when connected to a power bank. It involves installing a circuit that detects the upper limit of the terminal voltage. When the circuit realizes that your battery has reached its limit,the tension is interrupted. This means that your power bank will not continue to charge a full battery, meaning you no longer have to worry about whether your phone is safe when connected to a power bank.
So what makes a battery deteriorate?
While plugging your phone into a power bank or charging it overnight won't cause any significant damage to your phone, there are other factors that can contribute to your battery's short lifespan.
Kicking:Every battery has a lifespan, andit is greatly affected by the charging cycles. A normal phone battery can last at least 500 charge cycles without significant deterioration. This is about a year and a half of use, which is more than the time some of us use our phones. This degradation occurs due to the chemical reactions that typically occur when you charge your battery.
Temperatures:Temperatures at both ends of the spectrum usually affect a battery's performance. Very low temperatures increase the internal resistance of a battery and reduce its capacity. However, extremely high temperatures can short-circuit lithium-ion batteries. This could be ambient temperatures, but also heatpass charging.
Exit
It is safe to leave a phone connected to a power bank. However, you should also take some precautions, especially when choosing your power bank. Some of the cheap power banks on the market may lack features such as overcurrent protection, overload protection, short-circuit protection, over-discharge protection, or high temperature protection. Buying a quality product means you don't have to pay attention to your phone while it's near 100%, and you don't even have to worry about whether it's safe to leave a phone charging for too long.
