Power banks store electrical energy, and hold it, so that users can plug in later when they need a recharge. They allow tech users to plug into a power source that's mobile; essentially a portable battery with inputs to charge multiple devices. They can charge everything from Smartphones to Laptops simply by plugging into them.
Those looking to purchase a power bank to charge their laptop should remember that they'll need a larger size..
Battery capacity is measured in terms of milliamps, or mAh. Many laptops have around 5,000 mAh batteries, which means a 2,000 mAh is only enough for less than half a charge. Therefore, a computer with a 5,0000 mAh battery capacity requires a power bank of at least 5,000 mAh to guarantee at least one full charge..
for big size u should buy powerbank above 5000 mah to charge your laptop...
it is very easy to use
connect power bank to your laptop
u will see it is charging ...
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