Is it safe to charge your smartphone with USB?

In daily life, we may encounter such a problem: the computer USB to the smartphone after charging, the phone's power consumption seems to be faster than the charger after the charge, then what is the reason for this phenomenon?

Using a computer to charge a cell phone is not durable because our phone is not actually full of electricity.

In other words, although our smartphone shows a power of 100%, it's actually a dummy. For example, if the battery is a bottle, even if the stone to fill him up, still can put a lot of water, but in the computer USB to the smartphone charging, there is no "water" this link.

Why is this happening? In fact, this is related to the way cell phone batteries are charged. The way the phone is charged is to charge quickly, and the final phase of the charge requires a trickle charge (like a bottle of water), which is really full of electricity.

The so-called trickle charge is mainly used to compensate for the loss of capacity caused by self-discharge after the battery is filled. When the smartphone's battery is fully charged, the capacity of the self-discharge loss is about 5% of the standard capacity, and if not made up, the 5% part makes it easy to think that the battery is consuming faster.

However, trickle current is too small, and the process is very slow, and we tend to pull off the line in advance, the result is that 5% of the power of the moment is gone, even if the phone shows that the power is still 100%, this is only the power of the algorithm problem.

In addition, computer USB voltage of 5 V, this voltage is not enough to meet the current smartphone that 9v/12v fast demand (that is, the computer USB charge is very slow), and the current can not reach the standard of trickle charging, so everyone will feel that the computer USB is not satisfied with the mobile phone, even if "full" will also feel that the phone is very fast power off.

In this case, we have to consider a problem, the use of computer USB to the smartphone to charge security? Will it bring some damage to our smart phone batteries?

For such a problem, using a USB computer to charge a smartphone is safe and does not damage the battery. The reason is that today's phones, whether using a charger or computer USB to charge, are through the same USB cable. The different charging mode only exists the difference of charging current, the difference between the normal charger and the computer USB is only reflected in the speed of charging.

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