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Sunday, 14 January 2018

The wireless charge returns to be protagonist in CES 2018

Wireless charging has been present in several popular phone models and occasionally in models of laptops, and for years the manufacturers have been trying to impose it on the mobile devices segment. Wireless chargers continue to be protagonists in several launches in recent years in this field, and several of the latest models of high-end devices have this option integrated .

The wireless charging system has great advantages that certainly provide comfort, but also has some drawbacks
Among the most popular devices for wireless charging, there are the Google Nexus 5 and Nexus 6, the Lumia 930 or 1520 or the Samsung Galaxy S6 / Edge, but there are also a number of devices that despite not integrating support for wireless charging of series, yes they can be loaded in this way thanks to covers that enable that option.

Belkin was one of the first brands to appear when Apple announced the compatibility of its new iPhone 8, 8 Plus and X with wireless charging. Its base load is, along with that of Mophie, the only officially certified by Apple, which can be purchased at the Apple Store. Since then, the wireless charging bases, which have been in the market for several years, have become very popular. In CES 2018, new products have been exhibited in this category that will be released this year, some include a good number of accessories related entirely to wireless charging.

The first of all is a Belkin base that will be used to recharge two devices simultaneously, with two charging disks with a power of up to 10W each and which will be the perfect solution for many homes where there are two iPhones to be recharged daily. It is very similar to Apple's AirPower base that is not yet for sale and will also be more expensive almost with total security.

Among the companies that struggle to popularize this alternative in the market, there is the Power Matters Alliance (PMA) and the (Alliance for Wireless Power, A4WP). The technological principle of the latter is slightly different, and its Rezence charging technology by magnetic resonance, which is somewhat less efficient, but in exchange allows to have loading surfaces that can load several devices at once without these having to be placed in a specific position to achieve maximum efficiency in that recharge. In contrast, the PMA standard is based on the Qi in the inductive load, and that is the reason why for example the aforementioned Galaxy S6 is compatible with both Qi chargers and PMA chargers.

The wireless charging base has an induction coil to create an electromagnetic field that is used by the receiver device - our smartphone, which will also have an induction coil - to receive that energy from the electromagnetic field and turn it into an electric current to recharge Battery.

The main disadvantage is the efficiency, much lower than that of direct charging devices. The devices take more time to load, something more than double. In the case of Qi, charging is done through very high frequencies and it is necessary that the device is almost literally stuck to the charger to achieve the highest efficiency, in addition to having to be placed just in the right place to receive that load correctly .

In the latest revisions of these technologies, we try to minimize this and other disadvantages with the use of ultra-thin coils or higher working frequencies, an attempt to encourage the market.

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