Speaking of mobile power, we have to introduce the concept of charging treasure charging time. This does not refer to the charging time of the mobile power device to the mobile phone device, but the charging time of the power source to the mobile power source. Here is an algorithm that divides the capacity of the mobile power supply by the charging current and divides it by a power conversion factor of 0.8. The time obtained is basically the charging time. For example, a mobile power supply with a capacity of 5000 mAh is charged with a 1A charger. According to the above algorithm, it can be fully charged in about 6 hours.
When choosing a mobile power supply, you should pay attention to the charging time. Even if it is used during the daytime charging, if it is more than 8 hours, it is difficult to match the modern people's work habits: in the morning, I found that the mobile power plugged in last night is still still in use. Charging, this is a very unpleasant thing.
How to charge the charging treasure
If it is a digital product such as a normal mobile phone, then the normal 1A current output mobile power supply is completely sufficient, but if you want to charge the iPad, you need more than 2A current, otherwise the device will be displayed even if it is connected. If you are not charging, users can choose according to their own situation.
1A output current: The mainstream mobile power supply is generally a USB charging socket, while 5000 mA or even even products will be equipped with two or more USB interfaces. The biggest advantage of this is that you can charge multiple devices at the same time, saving time. However, there are drawbacks to this. For example, when multiple devices work at the same time, each interface cannot achieve the declared current output index, and the drop is necessary. This has high requirements on the circuit and quality of the mobile power supply itself, and users need to pay attention to the selection when purchasing.
Adjustable output current: It should be noted that the output current of the USB charging port mentioned above is basically 1A, which means that such a mobile power source cannot be charged for a high-current product such as an iPad, so the charging current is adjustable. The mobile power supply came into being. Such a mobile power supply generally has a plurality of charging output ports as standard, and the output current of each output port is marked in an obvious position, such as 1A, 2A, etc., and the user can select according to his actual use requirements. In addition, there is a single-port output, a variety of mobile power supplies with adjustable current and voltage. Because such products are expensive, bulky, and unacceptable in weight, it is difficult for ordinary users to encounter them in use, so we have taken it here.
Pros and cons of charging the same mobile phone with jacks with different current outputs
Advantages: The charging cut-off threshold of the lithium battery is calculated by voltage. Charging the same mobile phone with the jack of different current output will only get faster charging speed, has no effect on other parts of the mobile phone, and will not damage the mobile phone. .
Disadvantages: The only bad thing is that high current charging will bring higher heat, which is not good for the protection and maintenance of electronic components, and may accelerate the aging of electronic components. If the user does not need to charge the mobile phone with a large current, we still recommend charging according to the rated current required in the mobile phone manual, which is safer.
Charging treasure causes the phone to be disconnected
Many netizens reported that when the purchased charging treasure charges the mobile phone, it will be disconnected after a while. This situation is generally related to the quality of the mobile power supply, mainly due to the following factors:
1. The charging voltage of the charging treasure is not enough. This is determined according to the charging principle. It must be a high voltage flow to a low voltage. The mobile phone is generally 3.7V, and the mobile power lithium battery is 3.7V. This is a flat level, so the mobile power supply will boost to 5V when the output voltage is output. This produces a high voltage flow to a low voltage for charging.
2. charging treasure output current strength is not enough. When we tested some mobile power supplies, the above nominally has 800mAh discharge, but sometimes it can't discharge at this specification. This phenomenon will occur when the current intensity is not enough. This is closely related to the voltage. The most fundamental is the quality of the lithium battery. Good cause.
3. It is related to the mobile phone itself. It may be that the resistance of the phone is too large, in fact, the possibility of this situation is very small. Just mentioned here.
4. It is related to the PCBA protection board of the mobile power supply. In the first point, the protection board has to function as over-current and over-discharge, and there is also an MCU. This is used to boost. If the quality of the protection board is not good, it will be unstable when the current passes through. When the completion of the PCBA, and then the charging treasure can not be charged, the above situation occurs.