Apple takes the slow road to wireless charging

Wireless charging has been around for more than a quarter of a century, but only over the past decade did smartphone manufacturers begin offering it natively in their handsets.

In 2012, Nokia was the first to adopt the Qi-based wireless charging in its Lumia 920 phone.

The Qi specification, the industry's most popular, allows for power transfer ranging from 5 watts to 15 watts in the latest v1.2 release. Apple chose 7.5W of power transfer for the new iPhone 8 and the upcoming iPhone X.

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