How to correctly choose wireless charger

1, look for the QI certification

Wireless charging currently has two major international standards.One is the QI standard of the wireless charging alliance (WPC), which has 300 members worldwide.One is aira Alliance, which has 195 members worldwide.These two standards have unified regulations on the performance, technical parameters, compatibility and safety of wireless charging products, and have strict certification standards.

The QI standard is mature and occupies the mainstream.Choose a wireless charger, and see if the product has been certified by QI.Generally speaking, the product quality of the QI certification is reliable.

Identify professional brands

At present, the domestic wireless charger manufacturer is greatly small as many as thousands, have the brand also has more than 300.But most brands are not professional wireless charging brands, but are built by electronics, battery, 3C and even trading companies.These brands lack core technology and are weak in research and development.Therefore, choosing a professional wireless charging brand is more reliable.

The price is not too low

The principle of wireless charging is clear, but business applications are very difficult.The transmission efficiency, transmission distance, transmission performance, protection measures and so on all have high technical difficulty.Therefore, the cost of research and development will be enormous, and the quality of the components will be high.For example, a good chip is priced at a dozen or twenty yuan.

As a result, the quality of low-priced wireless charging products is questionable.

The conversion efficiency is high, the charge speed is fast

There is a problem of conversion efficiency for wireless chargers, and the current conversion efficiency of cellular wireless chargers is 60% to 80%.The higher the efficiency, the faster the charge.

But efficiency is not the only factor determining the speed of charging.Factories strong technical strength by increasing chip performance, optimization design, adjust the output current of wireless charging rival even faster than cable charging rate.For example, new page technology has developed standard wireline charging speeds and a two-fold standard wireless-charging acceleration technology.

5, the work temperature is not too high

Wireless charging is powered by electromagnetic induction, which has some heating problems during charging.Quality products working temperature generally below 40 ℃, feels only lukewarm, belongs to the normal range.

However, some cheap inferior products working temperature can rise to 60 ℃ above, and there is no equipped with intelligent temperature control device, use for a long time will damage the mobile phone, and pose a safety hazard.

The protection function should be complete

Good wireless chargers should have intelligent functions such as foreign body testing, temperature protection, overpressure protection and overcurrent protection.The detection function can prevent the electromagnetic overheat caused by metal objects.The temperature protection can be automatically cut off when the temperature is too high.Overpressure, overcurrent protection can automatically adjust voltage, current size, maintain charge stability and protect cell phone.If these functions are missing or not being enabled, the charging experience will be compromised, and there may even be a safety hazard.