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Canada all batteries for laptop, notebook, computer, Ultrabook, ToughBook, gaming PC, tablet, server, bluetooth wireless speaker, Medical equipment ect. There are more than 200 top battery brands on our site, such as acer, asus, apple, dell, lenovo, samsung, toshiba, sony ..., welcome choose replacement or genuine battery from us.

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Why we don't have 20,000 mAh or 40,000 mAh battery in laptop whereas we are getting up to 5,000 mAh battery in a small mobile? Compared to the size of mobiles, can't we have a high capacity battery for laptops?

There are several factors here.

1. mAh is a measure of charge storage, not energy storage.
A mobile phone with 5000 mAh at 3.7 volts stores 18.5 watt hours
A laptop battery with 5000 mAH at 11.1 volts stores 56 watt hours
The latter will be 3 times as big and 3 times as heavy as the former.

2. Airlines have a 100 Wh battery limit for electronic devices - hence even if laptop manufacturers managed to add more capacity, you could not carry it in a plane - no one would buy laptops if you could not take them on an airplane in your cabin baggage.

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