Oppo demos true wireless charging on its rollable phone
Apparently Xiaomi isn't the only mobile company working on over-the-air wireless charging. At MWC Shanghai 2021 earlier today, Oppo unveiled its own take on this futuristic tech, which is aptly dubbed "Wireless Air Charging" for now. The company's demo — both at the booth and in the official video — featured an Oppo X 2021 rollable concept phone placed on a wireless charger, and even when lifted up slightly while being gently tilted in various directions, the device was still able to charge.
According to Oppo, its Wireless Air Charging tech uses magnetic resonance to deliver up to 7.5W of power, and it kicks in when the device is within a 10cm distance from the charging mat. This may not sound as impressive as Xiaomi's "Mi Air Charge" which, using millimeter wave RF, can allegedly deliver 5W of power in any direction over several meters, though this requires a significantly bulkier (and likely costlier) charging station — much like the router for Energeous' WattUp system.
Both magnetic resonance and RF-based wireless charging are nothing new, of course. Members of the …
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