What happens if you use a laptop without a battery? If a laptop does not have a battery, can it be used? Malfunctions that prevent the laptop from working on mains power without a battery

Any rechargeable battery in a laptop breaks down over time. If you work with a laptop at home, you can turn it into a desktop computer. You can use this mode for a long time without damaging the device. The most important thing is to properly disconnect the battery, ensuring all storage conditions.

Laptop without battery: can it be used?

Today, laptops are equipped with lithium cells, which after 600-700 charging cycles greatly lose capacity (about 25%). With frequent use, they fail after a year. Also, lithium cells are very critical to overcharging and deep discharge. All this is correct, but why use a gadget without a battery?

Any gadget contains a power supply circuit from a battery or from an outlet, that is, there is a microcircuit on the board that controls the power supply.

If you connect the power supply to the device port and insert it into 220 Volts, the microcircuit switches the power supply from the outlet. In this case, if required, the lithium cells are recharged. The battery contains the same board called the BMS controller.

If the batteries are in the laptop and require recharging, the controller allows access to them for charging. In this case, the board controls the current strength, temperature increase, and voltage. When the parameters go beyond the possible maximum, the BMS turns off the battery. This prevents excessive heating and equipment failure.

The same happens during battery life gadget from batteries, that is, during discharge. The microcircuit monitors the voltage and turns off the device when it drops to critical levels. This prevents complete discharge and for this there is absolutely no need to use the laptop without a battery. All described actions are performed in normal mode, namely with the battery installed.

Reference! In addition, the power controller in the laptop itself switches to power supply mode from the outlet when the adapter is plugged into the network. If you disconnect the adapter, the controller will switch the device to battery power. That is, the battery in devices is the power source. So, during a power outage, you can continue to use your mobile computer on battery power. This is the main argument against using a gadget without batteries.

How to turn on a laptop without a battery

If you use a laptop at home, you can take it out to save the battery. Moreover, it is prohibited to store lithium cells when completely discharged: the charge must be at the level of 50%. That is, recharging is necessary 2-3 times every month.

You can use the gadget without the battery after it fails. To do this you will need:

Completely disconnect the laptop.
Turn the device over and open the battery compartment.
Remove the autonomous power supply from the case.
Close the compartment, then connect the power supply and power the gadget from the mains. Now it can be turned on and used for its intended purpose.

Features of using a laptop without a battery

Disconnecting the battery may occur for storage and does not allow the battery to retain its charge for a long time. The capacity decreases over time, although lithium cells fail much more slowly. As a rule, in 2 years it decreases to 15% of capacity. This can be prevented by regularly performing full charging and discharging. In this case, the battery will last longer.

Working with a device without a battery does not deprive you of any capabilities: you can watch movies, play games, run the required programs. If you take care of purchasing an uninterruptible power supply, you can ensure stable operation of your laptop.

To figure out why the laptop does not work on mains power without a battery, you should find out some technical points providing power to the laptop from various sources. Next, we’ll look at why the internal source turns off when the computer switches to power from the adapter, why this is done, and what malfunctions lead to the device not turning on without a battery.

How a laptop chooses a power source

Any modern laptop, unless, of course, it is an anonymous Chinese product, provides two power consumption schemes - that’s why it works both from the mains and from the battery. For this purpose, the laptop is equipped with special chips:

On motherboard, which, when the adapter is connected to the device’s power connector, switches the laptop to power from an external source. During this time, the battery is charged if necessary. When the external source is disconnected, it also includes a battery in the circuit, as a result of which the device operates from the internal power source.
A controller on the power source itself, responsible for controlling the charge and discharge of the device. This microcircuit, when charging is necessary, opens the access of energy to the lithium elements of the battery, then blocks it when it is fully charged or the temperature rises critically. Sometimes even the pressure of the charged elements is controlled.

In a word, the only reason why it may be necessary to remove the battery from the laptop is a malfunction of the battery or the controller that regulates the process of charging and discharging it.

Popular misconceptions about extending battery life

Common theories about extending the life of the internal power supply if it is removed from the laptop have no basis due to the described design mobile computer. If necessary, the microcircuit itself disconnects the battery from the network.

Therefore, in order not to increase the number of charge and discharge cycles (this is really a limited value - after 500 cycles, approximately 20% of the capacity is lost), you just need to connect the power adapter. The battery in this case works as an uninterruptible power supply (UPS). If you remove the battery, you will have to purchase a UPS separately.

How to safely connect an adapter without a battery

Let's give step by step instructions, with which the user can correctly and safely connect the laptop to the mains without a battery:

Disconnect the laptop and make sure it is not in sleep mode;
if there is an adapter connected to it, turn off the power;
remove the battery, note that on some models the battery is secured with screws;
Connect the adapter to the laptop, after which the power supply can be plugged into a power outlet.

Please remember that for safe operation of the device, electrical network it should be connected via a UPS, that is, as regular computer. Otherwise, there is a risk of damage when the power goes out. file system and loss of unsaved data.

Malfunctions that prevent the laptop from working on mains power without a battery

So, the malfunctions due to which the laptop does not work from an external source without a battery are as follows:

In short, there are not many reasons, and by and large the problem that has arisen regular user It’s unlikely to fix it, of course, except if replacement is necessary charger. But you still need to know the reason why the problem described above occurred in your case.

A laptop battery does not last forever. The battery life directly depends on the number of charge cycles. How large quantity Once the battery is charged, the shorter its life becomes "life". Therefore, in order for the battery to last longer, you should use the battery as little as possible.

If the laptop is intended exclusively for home use, you must remove the battery. Before starting work, you need to turn off your laptop. You should make sure that the laptop is completely turned off and does not go into sleep mode (hibernation mode), which sometimes happens on some devices. operating system must complete the work.