After Apple published the first iPhone in 2007, the mobile phone industry has ushered in an era of significant changes. The physical buttons on the portable phone panel have become fewer and fewer, now they have been removed. By 2020, the screen and the function of mobile phones are getting
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Now it is close to the end of 2020. But the people of COVID-19 are still a high number there. We are all tired of the endless info on the epidemic. Almost all the industries have suffered a tough time this year, including the power bank industry. The power bank
You may think the A in mAh looks weird. So do I. However, the A is capitalized because A is for “ampere” in the Units International System. And mAh is short for “milliampere-hour.” Understand mAh According to the evolution formula of Ohm’s law under the pure resistance circuit, we know
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