On《 [3.15] Unknown means of mobile power supply 1: virtual label capacity 》In the article, we mentioned the problem of the virtual label of the cell, but somehow you can also take apart the mobile power supply and see the labeled capacity of the cell. You know portable source There is also a very important but not intuitive indicator - conversion rate.

We know that when electronic products are working, some of the electric energy in the circuit will be converted into heat and wasted, so the cell capacity of mobile power cannot be 100% converted into digital equipment. The conversion rate of a mobile power supply is closely related to the circuit design (PCB wiring, battery wire diameter, etc.) and the electrical performance of components (boost chip, power inductance, power diode, filter capacitor). High quality components can not only make the mobile power supply have a higher conversion rate, but also make the mobile power supply work more stable and durable.

From the above figure, we can clearly see the advantages and disadvantages of circuit design and components

An inconspicuous component on the circuit board has similar functions, but the price of products of different quality varies several times or even dozens of times. In order to make profits, some manufacturers have saved and saved these components, or even cancelled them directly. Consumers cannot directly see the conversion rate, and most mobile power manufacturers will not actively promote the conversion rate of their products. Whether it is 60% or 80%, let the consumer guess by himself, let the consumer buy the product anyway. At present, there is a big gap in the conversion efficiency of mobile power products on the market. High quality power supplies can achieve a conversion efficiency of more than 90%, and low-quality products can even be less than 50%.

Let's do a simple arithmetic problem: take a mobile power supply with a nominal capacity of 10000mAh as the column, if the conversion rate reaches 90%, then the actual capacity that users can use is 9000mAh; If the conversion rate is only 50%, then the actual capacity that users can use is only 5000mAh, with a difference of 4000mAh. If consumers spend 10000mAh mobile power, they can only buy 5000mAh. Doesn't Dou E pay for it.

It can be seen that the conversion rate has become an important indicator that cannot be ignored, especially when people choose to purchase large capacity mobile power supplies. For ordinary users, it is really impossible to judge the conversion rate of a mobile power product. Fortunately, professional IT media are paying more attention to this aspect, Love to play computer games We will also do some product evaluations of mobile power. Before purchasing mobile power, we should look at these media to understand the real performance of mobile power and ensure that every penny we spend is worth it.

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