22 days ago

The price difference between the wireless charger on the market is big, from 30, 40 to 400, 500 multivariate. How much difference is there in the use experience? The truth-seeking laboratory prepared 4 wireless chargers and used Samsung Galaxy S9+ and apple iPhone 8 Plus for wireless charging comparison to see what the different charging speeds were different at different prices.

The charge efficiency advantage of Samsung's original charger is also well reflected in the charging power. The power of the first 40 minutes is high, the peak value is close to 10W, and the peak power of other wireless charger is only kept between 7 and 8W.

A brief introduction to 4 wireless chargers

This review of the wireless charger is Belkin Boost Up wireless charger (iPhone), Samsung original wireless charger (EP-PN920, second generation), millet wireless charger and South Fu cool Bo AirCharge mobile phone wireless charge.

There is no significant difference in the parameters of the other 3 wireless chargers except Belkin, in which the Belkin Boost Up wireless charger is bought by the iPhone version and supports the iPhone 7.5W wireless fast charging. The millet wireless charger supports millet MIX 2S 7.5W wireless fast charging, but the official parameter indicates that the actual maximum output power is 9W.

In the previous test, it was also found that the compatibility of different radio chargers was different, although the output power was about the same, the official recommended wireless charger was often more powerful than the other third party products, and the charging power would be higher and the charging speed would be faster.

Comprehensive evaluation of mobile wireless charging: is millet wireless really suitable for iPhone?

According to this theory, is it equivalent to "Galaxy S9+" and "iPhone 8 Plus" charging faster with the recommended wireless charger?

We can't get this conclusion before the test, because the test cell phone changed from iPhone X to iPhone 8 Plus, and the charging condition also changed from "20% charge 30 minutes" to "charge from 0% to full power".

Conditions for charging test

It also mentioned that the test was a wireless charging test of 0% to 100%, and we would use the running software to light the cell phone's power to the natural shutdown, set the cell phone for a period of time to drop the temperature, and then start the wireless charging test.

During the charging process, the cell phone normally acquiesce in the card, close the screen, turn on the WiFi and other normal functions, record voltage, current and electricity every 5 minutes.

Among them, Belkin Boost Up qi wireless charger has its own integrated charging line and charging head, so its total input power is recorded directly with a micro power monitor.

The remaining three wireless chargers are equipped with the Micro USB/USB Type-C interface, which can be used to record the output power of the charging head using the Power Z test table (the rechargeable head is used for the unified use of millet MDY-08-ES).

As the Belkin Boost Up wireless charger directly checks the total input power, the power is part of the power adapter, which is a bit higher than the other three other radio chargers that record the output power, about 0.5 to 1W.

Test results and analysis of wireless charging

First of all, as the Samsung Galaxy S9+ has an interest screen reminding function can be real-time view of electricity, so the time full of electricity can be accurate to 1 minutes, but the iPhone 8 Plus needs to light the screen to watch the electricity, full time can only be accurate to 5 minutes, but the error is also within 5 minutes.

Samsung Galaxy S9+ uses Samsung's original wireless charger for 173 minutes, which is more than 30 minutes shorter than the remainder of the other 3 third party wireless chargers.

Relative, the rest of the 3 wireless charger charging speed is almost the same, Belkin Boost Up wireless charger performance 207 minutes, millet wireless charger performance 204 minutes, South Fu cool Bo AirCharge mobile wireless charge for 201 minutes, the gap is not big.

As for iPhone 8 Plus, the result is a little unexpected, but it is reasonable. The charging time of the 4 wireless chargers is almost the same, the longest charge time is 230 minutes and the shortest is 215 minutes.

One of the most expensive Belkin Boost Up wireless chargers is the longest time in the world, and it may make it unbelievable that it's not a good support for Apple 7.5W wireless fast charging.

In fact, iOS 11.3 adjusted the wired and wireless charging power of iPhone to a certain extent, in which the wired quickly filled the unofficial PD fast charge function (that is to say the wired fast charge can only buy the official USB Type-C to Lightning line of the apple), and the 7.5W wireless fast charging is all cut down.

Compared with iOS 11.2, the peak power of iPhone in the new version system has declined in the wireless charging. The measured Belkin Boost Up 7.5W wireless fast charging time can only maintain a short 10 minutes, so the advantage of the Belkin Boost Up wireless charger under iOS 11.3 is much smaller.

From the "iPhone 8 Plus wireless charging power statistics" diagram, you can see that Belkin Boost Up, though seemingly charging power, does not forget that we are counting the total input power and actually deduct the power consumed by the power adapter, so the output power of the calculation and other wireless rechargeable devices should be no difference.

We can compare the same support for 7.5W fast charging, loading iPhone X with iOS 11.2 and iPhone 8 Plus. loading iOS 11.3 respectively.

The average power of 1 hours from 20% electric charge: iPhone X is 6.76W, and iPhone 8 Plus is only 5.87W, the gap is still relatively large, to a certain extent, the apple in iOS 11.3 system is further restricted to the charging power.

After testing, we can finally come to the conclusion: for Samsung Galaxy S9+, the official original wireless charger is still the first choice, even the old model EP-PN920 is still hanging a number of third party wireless charging.

For iPhone 8 Plus, as the iOS 11.3 system adjusts the power of wireless fast charging, it will not need to correct the official recommended high price wireless charger in the short term, and select the entry level wireless charger of the famous brand.

Here we also remind you that there are a lot of "wild chicken" products in the wireless charger for iPhone market at present, the price of 30, more than 40 pieces all have, it is suggested that everyone should choose carefully, the low price products do not have the ability to detect FOD foreign objects. If the metal objects are placed on the inferior wireless charger, the metal will be heated quickly. It can cause accidents.

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