Since the popularity of smartphones, their battery life has become a major factor in everyone's illness. Although the current mobile phone has a large battery of three or four thousand mAh, it still can't escape the two-day rush or even one-day rush of heavy users. . For the time being, limited by the development of electrode materials/structures, the energy density of lithium batteries cannot be increased without limitation. Therefore, charging has become an indispensable part of our daily lives. So what is the learning of mobile phone charging? Today I talked to you about how to charge correctly and safely.
Charging first passes through a constant current phase. At this time, the actual voltage of the battery is lower than the charging voltage (more than 4.3v). During the constant current charging process, the battery voltage is increased. When it is raised to 4.3v (the battery is about 85% full), enter 2 In the constant voltage mode, the charging current is gradually reduced, the charging is almost completed, and then enters the 3 trickle charging mode to charge the pulse current to extend the battery life.
First come the charging process diagram of a mobile phone charging (lithium battery):
It doesn't matter if you don't understand the above. In fact, the whole charging process of a smartphone can be divided into three parts:
1 constant current phase, at this time the actual battery voltage is lower than the charging voltage. The battery voltage (solid red line in the figure) slowly rises from a lower value to a fixed value, but the current (blue solid line in the figure) remains unchanged. And this is the constant current process of lithium battery charging.
2 In the constant voltage phase, after the battery voltage reaches a fixed value, the current output to the battery gradually decreases, and the charging efficiency also begins to decrease. And this process is the constant pressure process.
3 trickle charge mode, and finally, when it is nearly full, enter the trickle charge mode, charge with pulse current until it is fully charged, and the battery charge is completed.
Anti-blue Light Protective Film is a product developed based on reducing the harm of blue light to people. Compared with the emerging screen protectors on the market, in addition to anti-fingerprint, anti-scratch and other functions, the most distinctive function of anti-blue light screen protectors is blue light blocking. By absorbing and converting the blue light emitted from light sources such as mobile phones, computers, TVs, and LED lights, the anti-blue light protective film can greatly reduce the irritation of blue light to the eyes and control the deepening of myopia; in addition to preventing myopia, the anti-blue light protective film can also prevent myopia Absorption and conversion of ultraviolet rays to prevent skin dryness caused by ultraviolet reflection, resulting in skin pigmentation, chloasma and other problems.
All in all, blue light is indeed harmful to our eyes, but the Anti-blue Light Screen Protector can play a role in filtering blue light. As for the pots with visual fatigue and visual impairment, the blue light cannot be completely ignored. The best way is to try to control the time of playing with the mobile phone as much as possible. In daily life, we should learn to use our eyes reasonably and appropriately, which is the best way to prevent blue light and protect our eyesight.
Not only the use of mobile phones, but also when we use computers and watch TV for a long time, we should also use our eyes moderately, and look into the distance for a while every 20 minutes, so that our eyes can get enough rest. In addition, turning on the night mode on mobile phones and computers is also a feasible preventive plan.
Anti-Blue Light Screen Protector,Flexible Anti-Blue Light Film,Anti-Glare Blue Light Filter Screen Protector,Eye Protection Hydrogel Screen Protector
Shenzhen TUOLI Electronic Technology Co., Ltd. , https://www.hydrogelprotectors.com