Can be used as a mobile power supply for laptops. Charging a laptop's lithium battery requires a voltage of around 20V. Generally, mobile power supplies are designed for cell phones and tablets. They produce a voltage of around 5V and currents include 500mA, 800mA, 1000mA, 1500mA, 2100mA, etc. for mobile phones, 1500 mA. The values above are intended for tablet use. There are very few mobile power supplies that are actually used for laptops. This is mainly because they require an output of around 20V and a larger output current to charge the laptop. Lithium batteries must be connected in series and parallel to achieve such a high level. tension. The adaptation requirements for lithium batteries are quite high, and the circuit cost is also high.ve. Such a product costs nearly a thousand yuan, and the conversion rate is not necessarily high.
Can I use a power bank as an external power source to replace a broken cell phone battery?
Answer: No!
1 The power bank contains multiple 18650 lithium batteries or soft pack connected in parallel. Its rated voltage is 3.7V and full charge is 4.2V, the mAh size of. the power bank depends on the battery and the total capacity is determined by the battery size. To increase the voltage, the only way to increase the voltage is to rely on the internal panel electronics to generate a voltage increase to 5V1A. or 2A for use in different mobile phones.
2 When charging a mobile phone, the power bank has the same function as the mobile phone adapter. She hase also three stages of constant current flow and constant voltage when the mobile phone battery is full. , it will automatically cut off the load from the circuit board components. When it stays in standby, no current is output, so the power bank cannot work all day.
3 The 5V power of the power bank does not match the 4.2V power of the mobile phone. The 5V power entering the mobile phone does not enter the battery directly. is delivered to the battery through the voltage stabilizing circuit of the cell phone, so plugging the power bank into the cell phone socket cannot operate the cell phone! The startup and high brightness of mobile phones require a lot of current, and the power bank output cannot meet the startup current.
4 There are three battery cells in amobile phone, which correspond to the three battery cells. When the battery is charging, the battery also powers the mobile phone. For most mobile phones manufactured today, remove it. the battery and charge it with the charger. Unable to turn on,
5 If you want to connect your mobile phone to external power, you need to remove two items:
< p> a) Directly solder the 4.2V lithium battery of the power bank into the -4.2V socket of the mobile phone. You can create a model equivalent to the original battery. . Remove the protective plate from the old battery and install it on the fake battery. Put the positive and the negative. The wire is connected to the lithium battery, so that the power bank cannot be separated from the mobile phone. power, the power bank can be charged without affecting the operation of the mobile phone. I cancarry out this method simply, but I can only use it as a landline phone at home.
Thanks for reading!
If your residence has a low rate of power outages or you have a Xiaomi power bank, you can try keeping your phone charged. it is used as a landline telephone. If you have practical skills, you can pass a wire from the positive terminal of the battery to the positive terminal of the USB power supply (suitable for 5v2a mobile phones. At this time, your mobile phone battery can be saved) . or deleted. The conservation function of the battery protection panel is to make the mobile phone believe that the external power supply is the mobile phone battery, and only use it when the mobile phone self-tests. After that, an external cell phone adapter or power bank will be used to provide power.Modification is risky and the consequences are at your own risk.
My current mobile phone has been using this method for over a year. However, I have not experimented with cell phones with a power supply above 18 W.
If the voltage of the cell phone battery is the same as the battery voltage of the power bank is OK, but you need to keep the original battery protection plate and connector, and finally connect the positive and negative poles of the original battery in parallel to the station dump. On the external battery, if the original battery is disconnected, the capacity will be huge instantly. I connected two 18650 in parallel to the previous Nokia 6120, and the pure. standby time was more than one month.
Power Bank Can it be used as an external power source for cell phones instead of batteries? Of course,you can and you can't. Indeed, as a portable device, a mobile phone must have a power supply, that is to say a battery. Before Apple mobile phones took the world by storm, most cell phone batteries were replaceable.
If a cell phone battery is damaged or you want to replace the battery, you just need to buy a battery and ordinary people can replace it. In addition, in order to ensure that the voltage supplied by the mobile phone is stable enough and the current is pure, and for the safety of the mobile phone itself, it is not like a laptop. It does not require a battery and can be. powered by an external power supply. So if you remove the battery from your phone and plug in the power bank to charge it, you will find that the phone cannot be turned on.
Ainif, if your mobile phone battery is damaged and you remove the battery, plug in the power bank can't replace the battery because the mobile phone can't be turned on. Of course, if your mobile phone battery has not been removed, plugging in an external battery can replace the battery to power the mobile phone. But as for the question of size, I think you know that without me telling you.
Yes, the circuit inside the power bank has charging and voltage surge protection function. Simply connect the power bank's output to the mobile phone's charging port.
This should not work. I remember the MX4pro I was using had a battery problem at first, I don't know what the problem was precisely. has just been plugged in with the charger. When you press the power button pWhen turning on the phone, there will be a response, but it will not turn on, then disappear. I have no response when pressing the power button. I tried it several times and it always looked like this. I just guessed the battery was broken anyway, so I didn't worry about it.
Later I had nothing to do and wanted to prove if it was the battery. So I bought a very cheap battery on Taobao (to be honest, I was quite scared). , I was really afraid it would explode)[laughing and crying]), then I took out the battery from my cell phone. When I removed it, I found that the battery cable was broken. . I don't know if it was broken accidentally when I took it apart or if it was broken before [the face covering], but it turned on after I replaced the battery [laughs]. However, the good times didn't last long and he soon died. . [Face break] I don't havei didn't touch it either
Xiaomi power bank is very good. It contains lithium batteries, not several dry cells connected in series. phone to be standby It takes a long time and needs to be equipped with a qualified power bank
Definitely not possible
I don't know what you want to do. But we must overcome
1. Voltage
There are batteries. in power banks, secondary batteries i.e. can be reused
The output voltage of the power bank is generally 3 to 5 volts
The cell phone battery directly powers the cell phone when the voltage does not exceed 0.5 volts
2. Security Issues
Everyone knows this
So it is still not recommended to do this
It is best not to dothat. In addition, it is recommended to use the 360° charging protection function when charging.