What happens when the mainboard battery runs out of power
1. Every time the computer is turned on, the time will be restored to the initial time. That is to say, the computer will have the problem that the time cannot be synchronized properly and the time is not accurate. Therefore, we need to replace the battery without electricity.

2. The computer bios setting does not take effect. No matter how the BIOS is set, the default will be restored after restarting.

3. After the computer BIOS is powered off, the computer cannot start up normally. The black screen interface is displayed, prompting Press F1 to load default values and continue. Of course, some computers can also start up without the main board battery, but they often start up without the main board battery, which is easy to damage the main board South Bridge chip and cause the main board damage.

How to disassemble the mainboard battery
1. First buy a new motherboard BIOS battery. Be sure to use the same model as the battery on your computer. If your machine is a brand machine and is under warranty, you can contact customer service to replace it. Please do not open the case by yourself, otherwise the warranty will be cancelled. If it is a compatible machine (assembly machine), you can disassemble it by yourself and perform the following operations.

2. Turn off the power supply of the computer, and remove all wires and other related equipment plugged into the chassis.

3. Place the chassis flat on the table, open the screws on the computer chassis with a cross screwdriver, open the chassis cover, and put the chassis cover aside.

4. To eliminate static electricity, touch metal objects with your hands before touching computer hardware to prevent static electricity from damaging hardware.

5. After the computer chassis is opened, you can see the battery on the main board. It is generally round, with a diameter of about 1.5-2.0cm. Take out the battery first. The battery holder of each motherboard is different, so the battery removal method is also slightly different.

6. Push a small clip next to the motherboard battery with a small flathead screwdriver, and then one end of the battery will be cocked up, and it can be taken out at this time. However, some mainboard batteries are directly stuck inside, and there is no place to open the clip. At this time, you need to pry the battery out directly with a screwdriver.

7. After taking out the battery, put the prepared new battery back into the battery holder in its original position, lay the battery flat and press it in. Be careful not to install the battery upside down, and install it firmly, otherwise the battery may fail or not work.

 
How often to replace the mainboard battery

The mainboard battery is responsible for saving BIOS information and mainboard time, so we need to replace the battery when there is no power. Generally, the sign of no power is that the computer time is wrong, or the BIOS information of the motherboard is lost for no reason. At this time, the battery needed for replacing the motherboard is CR2032 or CR2025. The diameter of these two types of batteries is 20mm, the difference is that the thickness of CR2025 is 2.5mm, and the thickness of CR2032 is 3.2mm. Therefore, the capacity of CR2032 will be higher. The nominal voltage of the mainboard battery is 3V, the nominal capacity is 210mAh, and the standard current is 0.2mA. The nominal capacity of CR2025 is 150mAh. So I suggest you go to CR2023. The battery life of the motherboard is very long, which can reach about 5 years. The battery is in the charging state when it is turned on. After the computer is turned off, the BIOS is discharged to keep the relevant information in the BIOS (such as clock). This discharge is weak, so if the battery is not damaged, it will not be dead.