If you want to connect other batteries to your mobile phone, Anka can t turn it on

You dare to try this, the voltage of the battery and other conditions directly affect the stability of the don't be afraid**Ah, you can use the original battery shell with the inner core to solve it!

Is the voltage right? Today's mobile phones are generally so.

It's too low to start.

Too high will burn the machine.

Be careful to hang up the machine!

I also used this method, only connect the positive and negative poles of the battery, some batteries can be turned on normally, and some batteries will automatically shut down the phone immediately after turning it on

1. The battery protection board is a part of the mobile phone circuit, and it does not match, that is, it cannot be turned on normally.

2. The external battery lead is too long, and the wire has distributed capacitance or inductance, which changes the circuit parameters.

Solution: Install a small battery inside, the battery comes with a protection plate, solder or crimp on the contact point of the mobile phone, only connect the positive and negative, the external battery can be connected with a long lead, connected to the same positive and negative line at the connection point of the mobile phone, which is equivalent to two batteries in parallel, and can be used normally.

When charging, unplug the external large-capacity battery, charge it separately with a universal charger (with a protection board), and charge the battery in the mobile phone normally with the charger. If you use your phone to charge the large and small batteries at the same time, the current is too large, which may damage the phone, so I haven't tried it.

The advantage of this is that it does not damage the mobile phone, nor does it hurt the battery, and at the same time, the small battery in the mobile phone also plays the role of UPS, the external battery can be unplugged at any time, and the mobile phone works as usual, until it shuts down by itself when it runs out of power.

That's the battery you installed is not much, you can connect all 3 points to try it, if the problem is the same, then you can be sure that there is a problem with the battery you connected to the other, because the middle point is used by the mobile phone to detect the battery level.

The phone battery has 3 points of contact. You can't connect the positive and negative poles of your mobile phone with only 2 lines. There is also a battery strength test in the middle. You can see how many bars there is in the electricity.

"Cell phone.

The main factors that cannot be turned on are the battery, mobile phone software, and hardware that will cause failure to turn on. We recommend that you do the following:

1. Replace a mobile phone battery of the same model for testing or send the battery to the nearest service center for testing (applicable to models with non-built-in batteries).

2. Charge with a wire charger for a period of time and try to turn it on.

3. Take out the SIM card and SD card at the same time, and then press the power button for more than 10 seconds to test whether it can be turned on.

If it still can't be turned on, there may be a problem with the system program or hardware, and it is recommended to send the phone to the nearest service center for testing"

Generally speaking, there is no other problem, there is a problem with the battery, if there is a problem with the electric shock, there is an external power supply that can't be turned on, it's good to change the battery, or don't pull out the external power supply after turning on the battery for a period of time and then try again, if it doesn't work, change the battery, if the phone is used for too long or excessive consumption of power will cause the battery's chemicals to run out, this will also happen

What a mobile phone.

Try a brand new battery.

If not, it may be a problem with the battery contacts.

Or it's a power issue inside your phone.

Battery problem, change the battery, you definitely bought a fake battery, let him change it for you, it doesn't matter how many you add, it must be a commercial high-capacity battery, right, and a way, directly change a good battery for free in front of them.

There are many reasons why the mobile phone cannot be turned on, mainly including the following aspects:

1. The mobile phone battery is out of power, and naturally it can't be turned on, solution: charge the phone.

2. The mobile phone battery is broken, although it is charged, it cannot be charged, and it cannot be turned on, solution: replace the mobile phone battery.

3. Mobile phone failures, such as mobile phone circuit board problems, memory problems, cup problems, etc., will cause the mobile phone to not turn on, solution: the mobile phone is repaired after after-sales.

Check the battery tentacles of your phone to see if they are deformed or broken.

If you have a problem with the electric board, try it out with a new one!

The phone does not connect to the battery and cannot be turned on with a charger alone.

It's not like a laptop that can go to the battery and turn it on with a charger.

There's no way to tell you that it's not this line.

The external power supply is very simple, remove the built-in battery, and connect the wire to the battery compartment contacts.

But it's a bit troublesome to remove the switch button, and now the mobile phone is not a switch signal (simply understood as a light button in a room, press it to turn on), but a trigger signal, just like turning on a computer, you need to press the connection to automatically disconnect.

Then the boot button needs to be modified, and the boot button needs to be shorted and disconnected.

1. Remove the battery, and lead the power cord directly to the 5V power supply. 2. Remove the power button, lead out two wires, connect to the external delay relay switch, and set the delay relay time to within 5 seconds, so that the power on can be easily realized.

What is the purpose of doing this? The external power supply is as simple as connecting the wire to the contacts of the battery compartment. If you want your mobile phone to be the same as your TV, and you can watch the program when you turn on the power, it will take more than half a minute to start the system after the mobile phone is powered on.

The charging voltage is different from the battery voltage, the battery voltage is around, and the charger voltage is around, and the direct use of the charger will cause serious damage to the mobile phone. And it will cause the system to fail to detect the battery and cause problems.

Theoretically, it won't do any harm to the phone, the only thing is that the phone may burn the library or memory card after the sudden power failure!

Oh, I do power supply but I haven't done mobile phone development, in my opinion, it's because the mobile phone is a high mobile product, and the power consumption is not large (the notebook is different, you can't take it out, and the main thing is that it consumes a lot of power, and its battery is generally gone in about 2 hours), so there is no need to use an external power supply to supply power directly. Another reason is that the output voltage of the charger is generally a little higher than the voltage when the battery is fully charged, so if you want to directly use an external power supply, then a step-down or voltage stabilization circuit must be added inside the mobile phone, which will inevitably affect the PCB wiring and cost. I remember that when I used to make a mobile phone charger, NOK's antique function could be directly powered by external electricity.

The phone cannot be removed.

The battery, which is powered on directly through the charger, cannot be turned on. Because the phone has to be turned on through the battery.

The reason why the phone does not recognize the battery:

1. The phone and the battery are in poor contact, the solution: reinstall the battery.

2. The battery is broken, such as the battery contact piece is broken, the solution: replace the battery.

3. Mobile phone hardware problems, solutions: after-sales inspection and maintenance.

Basically, it's like this, I personally think that the mobile phone is a hand-fired radio, the total power is not large, but the peak power will be very large (pulse wave), if you don't use a battery, then you have to use a large capacitor to support.

The power supply of the computer is quite stable, and there are no sudden peak power requirements. Therefore, it can be used directly with the power supply.

Both are DC power supplies, but have different requirements.

The battery is direct current, and the charger is alternating current.

Laptops are supported by both DC and AC.

The phone only supports direct current.

(1): Because the mobile phone is powered by the electric board, it can only be turned on if it is powered by the electric board.

The reason is the same, your phone is turned on first, and the battery is removed, and it is even more so) The same is true for laptops.

Wrong link, right?? Just connect the phone and the battery. I've used it for a day. Not? Title.

For the power bank, it is okay to use it once or twice once or twice to temporarily solve the difficulties, do not use it often, it is not good for the mobile phone, because the technology of the mobile power supply is not very mature, and the operation is very dangerous, and some mobile power supply is of unreliable quality and unstable voltage, so it is easy to have problems, it is recommended to use authentic original mobile phone batteries.

However, the Scud phone battery is also good.

If you really want to use it, buy *** point of Yubo == However, it is recommended to buy an extra battery with a dock to charge it anywhere.

As long as your external power supply voltage is there, you can turn it on, and if it's below the minimum value, your phone will think that your battery is dead, and if it's higher than the highest, I don't know what will happen. With a universal charger, it can be used after being connected, and it can only be used normally when it is working.

First of all, make sure that the positive and negative poles are not connected incorrectly, and in the absence of equipment, it is best to look at the lower positive and negative of the battery before installing it.

Secondly, the normal boot voltage of the mobile phone is generally around the center, and the mobile phone will be burned if it is higher than 5V. Some mobile phones don't need two contacts to turn on, such as Nokia, which requires at least three contacts to turn on.

Maybe you don't have the tools to try it out now, teach you a trick, take the phone to match the battery, generally they will measure whether the phone can be turned on, and you only need to remember how many contacts they use to turn it on.

1. It's not that the power supply quality is poor, the mobile phone charging does not allow such a high voltage, it damages the battery, the mobile phone protects itself, and it is good not to burn the mobile phone;

2. The charger has the function of controlling the voltage and current, and can automatically stop charging when fully charged, which cannot be replaced by ordinary DC power supply;

3. If you want to use the same as 2, you can use a 7805 to get it, no resistance.

The main thing is that you connect the battery binding post incorrectly, the lithium battery charging voltage and discharge voltage. Secondly, 1V is 20% higher than 5V, of course not.