How to turn on a tablet without a battery

Ways to start your phone or tablet without a battery

When deciding to repair the device yourself, you should be prepared for the possible risks and soberly assess them. Lucky owners of older phones, as they can easily be turned on by applying an adapter.

Modern machines allow you to connect directly to the inputs to the board. The main thing is to use the correct adapter and not to reverse the poles.

When you may need to turn on a gadget without a battery:

  • You need to check the working condition of the phone;
  • It is necessary to urgently turn on the device to retrieve data;
  • the device is planned to be rebuilt to function without a battery.
  • the battery does not work due to a breakage or is completely discharged ;
  • the battery capacity is lost;
  • the old device is needed for use in alarm systems.

How to know if your phone’s battery has run out of power:

  • the battery runs out quickly;
  • The phone fails to fully charge, no matter how long it has been plugged into the power cord;
  • The device gets very hot while charging.

Most often, the process of connecting a phone without a battery is associated with the extraction of important data from it. Regardless of the reason, you need to know how to properly turn on your device without causing damage.

How to turn on a tablet without battery

I removed it in the settings, turning off all the warnings and deleted the phrase battery is low in the Navitel and nothing else bothers me

I removed it from the settings by disabling all warnings and removed the phrase battery low in navigator and nothing else bothers me

no such settings in the stock firmware. And google maps do not have such settings.)))) so the solution is not for everyone

Is there a photo of the nexus 7 battery controller so you can see the marking of the controller chip ? If so please post it. To try it out, bought a Asus vivotab 8 on Windows 8.1, kurochat battery life until I can not, and I want to pass at least some time for reliability and warranty. I want to see the datasheet on the controller and the possibility of emulating it. Kind of like the controller can give commands for the tablet to go to sleep and a bunch of other things.

It seems like the controller can give commands for the tablet to go to sleep and a bunch of other things. You need to control the controller at the SMB in the tablet, and this does not give anything, except to prolong the life of the battery

You need to control the controller on the SMB in the tablet,

So, to steer it, you need to feed it via i2c with the right information. And to slip it to him, you need to know what and how.

So to steer it, you need to slip it the right information via i2c. And to slip it to him, you need to know what and how.

Hi all! I read the thread and did not find an answer to my question (or rather some Комментарии и мнения владельцев have shaken my confidence). If a Chinese tablet (not a Nexus7) powered by a converter for 3.7V (his battery produces this voltage at 100% charging), cutting out the battery and the charge controller, will OTG work? Purely logically I don’t seem to see a problem, but here someone wrote that it is provided that the tablet Nexus7 and the core is appropriate. Is this true??

Well, to control it, you need to slip it the necessary information via i2c. And to slip it that, you need to know what and how. I think maybe intercept the communication via bus, there is a logic analyzer, but now you need the tablet again.

turn, tablet, battery

If a Chinese tablet (not a Nexus7) powered by a converter for 3.7V (his battery gives this voltage at 100% charge), throwing out the battery and charge controller, will OTG work?

if the OTG works on battery power then it will work on DC-DC. 3.7 is a fully discharged battery. Charged 4,2. After throwing out the battery do not throw out the controller if there are more than two wires going from the battery to the tablet.

PS the controller located on the battery is not a charge controller. He’s got other things on his mind.it is a controller to protect the battery from overheating, overcharge, overdischarge, short circuit and other factors. In a competent design, the tablet needs some information from the battery. Lacking this information the tablet gives an error (nexus draws an exclamation mark)

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If the OTG works on battery power, so will the DC-DC. 3.7 is a fully discharged battery. 4.2 when fully charged. If you throw the battery away don’t throw away the controller if there are more than two wires going from the battery to the tablet.

PS the controller located on the battery, is not a charge controller. he’s doing the other thing.is a controller to protect the battery from overheating, overcharge, overdischarge, short circuits and other factors. In a proper design the tablet needs some information from the battery. Losing this information the tablet gives an error (nexus draws an exclamation mark) Thank you! Checked it, it worked, from 4.5V (maybe from 5V) the tablet works, so does the OTG. I have 3.7В. this is a fully charged battery, t.к. Cube U51GT-C4 tablet. There are 2 wires to the motherboard on the tablet ( and.), when I turn on it shows 100% charge and no error. Perhaps it is better that the tablet is not very “smart” in this respect:yes4:

I have 3.7В. it is a fully charged battery,

it does not happen. Either the tablet is lying about being charged or the multimeter. 3,6-3.7 discharged 4,2 charged axiom for LiPo Li-ion

It doesn’t work like that. Either the tablet is lying about being charged, or the multimeter. 3,6-3.7 discharged 4.2 charged axiom for LiPo Li-ion

It’s weird, I measured the voltage before. was 3.7, now. 3.75. But it may not be a full charge. Anyway, 4.5V would be fine to feed and lower from the output converter a bit 🙂

I think maybe intercept the bus communication, there is a logic analyzer, but now I need the tablet again.

This is a long way to go, intercepting then a long time to think what is responsible, a long process, but if you knew what data is responsible for what would be better. So you need to know what kind of chip, and what it does, and how it can be used.

PS the controller located on the battery is not a charge controller. It does other things.this is a controller to protect the battery from overheating, overcharge, overdischarge, short circuit and other factors. In competent execution, the tablet needs some information from the battery.

It’s interesting you say it’s not a charge controller although you listed the main functions of a charge controller. And the power controller, which determines where to draw power from and where to feed it to, is another matter. But not to argue, you need to know exactly what kind of chip.

It’s not that common. This infestation counts how much energy the tablet has consumed, which is reflected in the percentage of the battery, and it does not care what it is fed 4.5v (like the battery is fully charged)

It’s not that common. This contaminated keeps track of how much energy the tablet has consumed and reflects the percentage of the battery, and whatever it is fed 4.5v (like the battery is fully charged)

You speak english, here you can find the 7541 chip. https://www.dropbox.com/s/95q4vjriyq8pgw9/slva413a.pdf?dl=0

If you speak English, you’ll find the chip 7541. https://www.dropbox.com/s/95q4vjriyq8pgw9/slva413a.pdf?dl=0

This is a hint of a bq27541 chip installed in the battery ?

This is a hint to the bq27541 chip installed in the battery ?

Thanks, that’s what I needed 🙂 and there are tons of datasheets on the web.

red and black power, 2 more wires bus i2c enough to power, but it turns on long 15 seconds hold the power button, at any firmware

How to avoid this? Power Button will be unavailable. Power management file changed in android. The tablet turns on automatically at power on. Is it possible to keep it with “thrown away” battery? I do not want to put extra buttons somewhere outside. Thanks. zy. tablet. Galaxy tab 7.0plus

Software crashes

If you can’t turn your device on after installing or running an application, you will need to perform a reset or manual reboot. On the case of the device find the reset button marked with a red dot or the word Reset. Usually, this key has a very small size and can only be pressed with a toothpick or thick needle. Press the button with an object of your choice and then try to turn the tablet back on. It is possible that this operation will delete all your data and reset the device to the factory settings. This way all the information stored in the device will be erased.

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If none of the above steps has not helped, refer to the technical support service of the manufacturer of your device or take the device to the service center, where they can make a diagnosis of the tablet hardware and fix the damage.

turn, tablet, battery

The problem with the on-off button on the tablet PC can be faced by any owner. The reason could be a malfunction in the programs or in the “iron. But most often the problem with the failure of the button is faced by those users whose tablet has a damaged cable, battery, board or other defects. Another common “illness”. it is the operating system of the device. It happens after an update or incorrectly installed software. Answering the question of whether you can turn on the tablet without the power button, experts believe that such a procedure can be performed.

Ways to restore the battery on the tablet

The easiest and most common way how to charge the tablet Asus and any other firm without charging. to feed the tablet from a laptop or computer. For this you need to have at hand a USB cable. With it you will connect two devices with each other, and from the computer slowly but surely will flow into the battery tablet.

The advantages of this method of charging your tablet in the simplicity of implementation, availability of a method and equipment for this. And the only disadvantage is that it takes much more time for the full charge than when using a conventional charger.

The third way to charge your tablet without a charger is to use a self-contained power source, i.e. an external battery. It is connected to the tablet through a cable that will carry the charge from one device to another.

A huge advantage of this method. a great mobility. Even if you are in a deserted place during a hike, you can always keep your tablet charged. over, the external battery does not take much space and weighs only a little. But it must be well charged.

Sometimes it happens that the charging jack on your tablet is broken, and you need to charge it very urgently. How to charge your tablet without a charging jack is the question. But this is also quite feasible. This method is called direct charging. You need to remove the battery from the tablet and apply the terminals from the power source to it. With this you will connect the battery directly to the charger.

To use such method is possible only in the most hopeless and extreme case, because it can lead to the battery failure. It will charge, of course, quickly, but you need to be able to adjust everything very accurately and constantly monitor the process.

A laptop is a very handy gadget, the main advantages of which are mobility and performance. But often the laptop battery is discharged at the most inopportune moment. In this case, the device can be charged even without a special charger. For example, with the help of another laptop.

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The most common type of batteries. lithium-ion. It is them most often used in a variety of gadgets. But there are also other types of them, in particular nickel-metal hydride batteries. How to properly charge these. read the article.

Possible consequences

When trying to start the phone without a battery, you need to be careful and be prepared for unpleasant consequences. If there is very important information on the device, it is better to buy a new battery as a replacement for the old one. Lovers of experiments should take into account the following:

  • The appearance of interruptions in the work of the gadget or severe damage to the phone of an older model;
  • Inability to turn on due to the mismatch of power and voltage of the current supplied to the cell phone;
  • Lack of knowledge and skills in electronics will ruin the machine;
  • Failure to observe the safety precautions can be harmful to your health and the device itself.
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You should also be wary of a short circuit. It can lead to a device fire.

Communication module

If the device does not start, then most likely it has a module for exchanging data with the power supply. And how to connect the phone without the battery in this case? Isn’t there any loophole? You can disassemble the smartphone and connect the adapter directly without touching the controller.

Another option is to “mimic” the charger unit. That is, make your own adjustable resistor. If you have never used a soldering iron, do not know how to solder pins correctly, and do not understand electronics, trust this work to professionals.

Here’s how to turn on a cell phone without a battery if it has a data exchange module on it:

  • Take the housing from an old battery. Or create its “model” of the improvised means. It must have pads for contacts.
  • There is usually voltage at the two end pins of a cell phone battery. In between are the “data” terminals. They are connected through a resistance of 20 kohms before the last contact to the cable with a negative charge.
  • On the “pad” solder contacts with the resistance required in the batteries of smartphones. This is not the easiest way to start your phone without a battery.
  • Now connect the wires from the power supply. Just be aware of the polarity.

Failure to observe safety precautions can lead to a short circuit

This is not a very reliable option. At best it won’t work. In the worst case, you can simply break your device. To prevent your gadget from shutting down at all, use a UPS. If you want to make a phone call or look up information on your smartphone, a wall outlet or a computer will be enough.

Now you know if you can turn on your phone without a battery. Do not do this for nothing. If you are going to use the gadget in a security system, it must work without the battery. In other cases it is better to buy a new battery.

The money is

Yesterday I went on a business trip to Shushary. I’m standing in front of the supermarket waiting for my acquaintance. And a staggering-looking man, distinctive-looking, walks up to me. In appearance, clearly either a homeless person or a very close to it social element. Well, accordingly, the intentions with which he was walking were clear at the first glance.

Having said this phrase he took a handful of coins out of his Then he thought for a while and sadly continued:

Charging your tablet battery

As for charging the battery of the tablet, it should be remembered that the battery should not be fully discharged. Manufacturers recommend discharging batteries no more than 80 percent. The myth about the need for a full discharge has been left over from the days when mobile electronics used. This category of batteries has a complete discharge due to the “memory effect”. The tablet is now equipped with lithium batteries, which are free of this affliction.

Charging has a lot to do with the life of your tablet’s battery. Lithium batteries function perfectly even if they are not fully charged. For them, the optimal degree of charge is 50─80 percent. By the way, for this type of battery a 100 percent charge is undesirable, as well as overcharging. At the same time they are at risk from deep discharge, which can even lead to failure.

Most quality tablets and smartphones have their own charge controller that shuts down charging when the battery reaches full capacity. If your device does not have such a controller, the charging process must be constantly monitored. And your tablet’s battery will need to be turned off as soon as it reaches 100 percent charge. Charging of the battery is usually done by means of the power unit for the domestic mains supplied with the device. The tablet battery can be charged via USB interface or service jacks, if available. But nothing prevents you from charging the battery directly with various multifunction devices like. But to do this you will need to disassemble the tablet to remove the battery.

Below you can watch a video of charging your tablet battery directly from the charger.