How Do I Choose the Best Laptop Power Supply?

Laptop external batteries are also called "laptop laptop batteries", "backup batteries", "mobile power", and generally refer to a device that provides power to the laptop's power storage. It uses high-performance imported lithium polymer batteries with a capacity of 74WH (20000MAH), and has been tested by FUJITSU, IBM, Compaq, Dell, HP, Leo, Mitsubishi, NEC, Samsung, Sony, Toshiba, Lenovo and other notebooks. Through different intelligent discharge adapters, the voltage and current can be automatically adjusted, and more than 95% of the notebook computers on the market are applicable. The built-in USB output interface can be used for all devices with USB charging, such as mobile phones, PSP, IPOD, MP3, MP4, PMP, GPS, Bluetooth, digital cameras, etc. The external battery gets rid of the limitation of the battery in appearance, volume and weight, which also makes it large in capacity and can greatly extend the standby time of the notebook. And its price is much cheaper than the original battery. Generally speaking, the price of the original laptop battery is around 250-350 yuan, and the external battery of the same capacity is much cheaper than the original battery.

Laptop external battery

Laptop external batteries are also called "laptop laptop batteries", "backup batteries", "mobile power", and generally refer to a device that provides power to the laptop's power storage. It uses high-performance imported lithium polymer batteries with a capacity of 74WH (20000MAH), and has been tested by FUJITSU, IBM, Compaq, Dell, HP, Leo, Mitsubishi, NEC, Samsung, Sony, Toshiba, Lenovo and other notebooks. Through different intelligent discharge adapters, the voltage and current can be automatically adjusted, and more than 95% of the notebook computers on the market are applicable. The built-in USB output interface can be used for all devices with USB charging, such as mobile phones, PSP, IPOD, MP3, MP4, PMP, GPS, Bluetooth, digital cameras, etc. The external battery gets rid of the limitation of the battery in appearance, volume and weight, which also makes it large in capacity and can greatly extend the standby time of the notebook. And its price is much cheaper than the original battery. Generally speaking, the price of the original laptop battery is around 250-350 yuan, and the external battery of the same capacity is much cheaper than the original battery.

Chinese name

Laptop external battery

Foreign name

Notebook computer external battery

physical dimension

186 * 112 * 21mm

weight

470g

operation hours

2-4 hours

Output current

4000mAh (4A)

Cycle life

> 500 times

Appearance size: 186 * 112 * 21mm

Weight: 470g

Color: silver, black

Output current: 4000mAh (4A)

Rated output: DC 5V / 1A, 7.2V / 1A, 9V / 1A, 16V / 4A, 19V / 4A

Static power consumption: less than 100uA

Lithium battery capacity: 2000mAh / 74WH

Running time: 2-4 hours

Charging time: about 4-5 hours

Cycle life:> 500 times

1. Output voltage and power interface

When choosing an external battery, the first thing to pay attention to is whether its output voltage and interface can be used in your laptop. Since most notebooks will

Desktop computers use AC power. Most people may not pay much attention to the energy-saving features of computers, but for laptop computers that require battery power, the use of energy-saving features should be valued. How the computer hardware is designed to be more energy-efficient is not a problem for the user to solve. What the user can do is to use the energy-saving options effectively on the computer settings. There are two energy-saving settings that need to be adjusted by the user: one is the setting of the energy-saving mode in the computer's BIOS setup program, and the other is there are many energy-saving settings and operations in the operating system. When the computer system is actually executed, the energy saving settings in the Windows system should take precedence over the settings in the CMOS.

Energy saving settings in the BIOS

In CMOS settings, there is a "Power Savings", which can select multiple options such as "Maximum Battery Life" and "MaximumPerformance". "Maximum Performance" is the default power saving mode setting. There are several states of the laptop's power-saving modes, such as Idle Mode, Standby Mode and SuspendMode. These settings on the notebook computer can adjust the power consumption, mainly after the computer enters an energy-saving state, shut down some system equipment that is not needed in a timely manner. For example, in the waiting state, turn off the monitor and hard disk. After entering the hibernation state, in addition to turning off the monitor and hard disk, you can save the contents of memory to the hard disk. The entire computer system basically maintains the off state. Once the computer is activated or restarted, the desktop Will return exactly to the state before hibernation. The energy saving setting in CMOS is mainly to set the time for Standby Timeout from Idle Mode to Standby Mode, and set the time for Suspend Timeout from Standby Mode to Suspend Mode. Most laptops use Phoenix BIOS. Different BIOS energy saving settings may be different. Read the on-screen instructions carefully.

Energy saving settings in Windows

For general users, it may be simpler to perform energy-saving management operations in Windows systems. In the Windows help file, under the "Manage Hardware and Software" entry, there are two items related to energy saving in laptops: "Managing Power" and "Managing Power on Laptops" in "Using Laptops". You should read these before you set up Windows energy-saving settings. In Windows Control Panel, click Power Management to open the Power Management Properties dialog box. In the "Power Management Properties" dialog box, set the "Power Usage Plan" to "Portable / Laptop", and arrange the "System Wait", "Turn Off Monitor", "Turn Off Hard Disk" and other options appropriately. There are some differences in the options that different computers can handle. There are more options available for newly manufactured computers and the latest software. The detailed settings should be based on the functions of the computer itself and the Windows help file. In addition, if your laptop has a built-in infrared port, you should disable it when not in use, which can extend the laptop battery life.

Many people encounter such a problem, and the laptop battery will have problems soon after it is purchased and used, and cannot be stored or charged. As part of a laptop, the battery also needs to be maintained. Improper use or improper placement can easily cause problems, bothersome and have to spend money to buy new ones. And a good quality battery is more expensive, so how to maintain the battery to extend the battery life? Let s learn together. ^[1]

To reduce battery usage, I recommend using the battery when you cannot find a power source. Lithium batteries only have a charging life of about 400 times. Frequently working with batteries increases the number of times the battery is charged. If you charge it on average every two days, your battery will be basically scrapped for more than a year.

Do not use the battery without the power adapter. When working with AC power, remove the battery as much as possible to avoid frequent discharge and charging of the battery. Lithium batteries discharge an average of 0.2% on their own every day. Generally, a laptop computer will charge as long as it detects that the battery is not full. Even a high-quality laptop computer will start charging the battery when the battery is discharged. Recharging many times greatly shortens the battery life.

The new battery needs to be activated for operation. The battery of a new laptop computer should have 1 ~ 2% charge. If the charge is full, it must not be a new battery. After the computer is unpacked, do not connect external AC power. Let the machine run out of the battery s residual power, then fully charge the battery at one time, then discharge it all at once, and then fully charge the battery at one time. This can fully stimulate the battery activity and greatly improve the battery charging capacity .

Improving the battery memory capacity If the battery is used for a long time and has a certain low-charge memory capacity, the power supply capacity is greatly reduced. You can use the discharge method to improve the battery performance. The method is as follows: enter the computer BIOS to turn off the power management function, do not let the laptop have low voltage protection function, unplug the AC power, use only the battery to power, and then turn on the battery to completely exhaust it, and finally fill the battery.