Laptop external battery is also known as laptop plug-in battery, backup battery and mobile power, which usually refers to the device providing energy for laptop power storage. It uses high-performance imported lithium polymer batteries, whose capacity can achieve 74WH (20000MAH), which has been tested through a variety of FUJITSU, IBM, Compaq, Dell, HP, Leo, Mitsubishi, NEC, Samsung, Sony, Toshiba, Lenovo and other laptops. It automatically adjust the voltage and current through different intelligent discharge adapter, which can be applied to more than 95% of the laptops on the market now. The built-in USB output interface can be used by all USB charging devices, such as mobile phones, PSP, IPOD, MP3, MP4, PMP, GPS, Bluetooth, digital camera, etc. Now, the external battery gets rid of the restrictions of the original battery on the shape, size and weight, which also makes it do much in the capacity and can greatly extend the standby time of the laptop. The price is a lot cheaper than the original battery. In general, the price of the original laptop battery is thousand RMB or so, while the same capacity external battery only costs a few hundred RMB.
Note whether the output voltage and interface of external battery can be used on your laptop
When selecting external battery, the first thing to note is whether the output voltage and interface can be used on your laptop. Most laptops will carry out stabilized voltage and secondary variable voltage for the voltage input by power interface, which will expand the adaptation range of laptop to the voltage input by the power port. Therefore, when selecting external battery, the output voltage is not necessarily to be consistent with the power adapter output voltage.
The output voltage is preferably slightly lower than the output voltage of the power adapter
In general, as long as the output voltage of the external battery is not less than 90% of the output voltage of the power adapter, it can be used normally. Of course, if the external battery voltage is slightly higher than the power adapter voltage, the laptop will generally have no problems. After all, high voltage is more dangerous, which may damage the internal regulator and protection circuit of the laptop. So when buying external laptop batteries, the output voltage is preferably slightly lower than the output voltage of the power adapter. In the case of not being able to purchase, the output voltage of the external battery cannot exceed 10% of the output voltage of the adapter.
Be careful in the choice of interface
At the same time, the laptop has a variety of standard power connectors, and now most of the external batteries are also equipped with a variety of interface specifications, which can nearly meet all the requirements of the laptops. But you should note that most external batteries use the universal connector + multiple power interfaces to adapt to different laptops. Once we accidentally take the wrong power connector, and force it into the laptop, it may damage the laptop power connector. The power wrong polarity will have more serious consequences, which will directly damage the laptop. Therefore, we must be careful in the choice of interface.
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