What’s the relationship between mAh and Wh of battery capacity?

Now people spend more time on a mobile phone than before, the battery capacity has gradually become an important index to buy mobile phones. If other conditions are similar, generally the battery capacity will be a standard to choose.

We often hear phone capacity with mA (mA), tend to be so called. Said the real capacity is not called mA (mA), but mAh (mAh), it is said is the product of current and time. Just people in order to facilitate and referred to as ma, used by people, even if the wrong we can understand what to say, and you can't have. Wrong also used so many people because, after all, not everyone is so understanding related theory knowledge, just about know what meaning.

You look at their mobile phone battery (general mainstream smart phones), what is the average capacity of mAh (mAh), generally within the scope of the 23000 mAh, the following figure (buy in order to avoid the suspicion of advertising, I will go to the brand, this from the Internet to sell battery image capture, is valid):

But not all cell phone battery is represented with mAh, have a plenty of use Wh represented (watts), as shown in the figure below:

Watt hour is also used to indicate battery capacity, is the same as the mAh, has the following conversion relations between them:

Such as in the picture above 9.88 Wh, if converted to mAh, that is: 1000 * 9.88/3.8 = 2579, or 2579 mAh. The 3.8 is the nominal voltage of the battery.

As for why businesses prefer using mAh to use Wh? It involves the consumer psychology. I give you show me you will understand: below the nominal voltage is 3.8 V battery, but capacity is slightly different.

A 2700 mAh battery, converting into Wh is 10.26, 0.38, it is just 0.38 more than 9.88, the change is not so obvious. It feels like almost the same. But if use mAh to show in 2579, it is 100 more. For ordinary consumer, I feel like more people will prefer 2700mAh when it is shown in mAh, and it is likely to be random when it is shown in Wh, which one has higher sales is uncertain. If you understand this conversion relationship, you will have ideas when you buy a mobile phone.

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