Nowadays, the time spent using mobile phones is much higher than before, and the capacity of mobile phone batteries has gradually become an important indicator for purchasing mobile phones. In other cases, battery capacity is generally used as a purchase standard.
What we often hear is that the capacity of mobile phones is expressed in mA (milliampere), which is generally called. In fact, the true capacity is not called mA (mA), but mAh (mAh), which is the product of current and time. It’s just that people call it mA for convenience. People are used to it. Even if we can understand what we mean by mistake, it doesn’t matter. The mistake is also used by so many people because after all, not everyone is so knowledgeable about the theory, as long as it knows what it means.
You look at your mobile phone battery (generally mainstream smartphone), the general capacity is marked by how many mAh (mAh), generally in the range of two or three thousand mAh, as shown below (in order to avoid the suspicion of advertising, I erased the brand. This is a screenshot of the picture of the battery sold online. It is really effective):
But not all mobile phone batteries are represented by mAh, and some are represented by wh (watt hour), as shown below:
Watt-hour is also used to indicate the battery capacity, and the same is true for mAh. There are the following conversion relationships between them:
As shown in the figure above, 9.88Wh, if converted to mAh, it is: 1000*9.88/3.8=2579, which is 2579mAh. Where 3.8 is the nominal voltage of the battery.
As for why merchants like to use mAh instead of using Wh? This involves consumer psychology. I will show you what you understand: the battery below is also 3.8V nominal voltage, but the capacity is slightly different.
2700mAh battery, converted to Wh is 10.26, only 0.38 more than 9.88, the change is not so obvious, giving people the same feeling, but when expressed by mAh 2579, it is more than 100. Put it on the average person, I feel that when using mAh, choose to buy more than 2700mAh, and with Wh, it is likely to be random, not necessarily which one is high. If you understand this conversion relationship, you will have a number when you buy a mobile phone.
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