With the launch of the new iPhone 13 at Apple’s September event, we were hoping to see one much-wanted feature: reverse wireless charging. Unfortunately, while the technology has apparently been found in the iPhone 12 (according to the US Federal Communications Commission) and can be used to reverse charge Apple’s MagSafe Battery Pack, it hasn’t been made more widely available. So what is it and how does it work?
How wireless charging works
Wireless charging isn’t exactly new: it was first demonstrated over 100 years ago by Nikola Tesla, and if you have an electric toothbrush you’ve probably got a wireless charger in the bathroom. The technology hasn’t really changed much over the decades. It’s just got more efficient. When we talk about wireless charging in a phone or tablet context, we’re talking about using electromagnetism: it’s possible to transmit electricity via radio frequencies, but it isn’t powerful or practical enough for everyday use.
Electromagnetic charging consists of a transmitter and one or more receivers. The transmitter, which is your wireless charging pad or puck, creates an oscillating magnetic field. When they’re close enough, that magnetic field induces a current in the coiled wire loops inside the receivers. That current can then be used to recharge the battery or even power small electronic devices.
この記事は MacFormat UK の November 2021 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です ? サインイン
この記事は MacFormat UK の November 2021 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
Death Stranding Director's Cut
An outstanding horror tale
Hidden Kingdoms
Panic relief for the nervous traveller
QDOS SnapStand 3-in-1
Charge three devices in one plug socket
Record sounds on Mac
Record different sound sources with QuickTime Player and Audio Hijack
One more thing Apple Watch
Graham Barlow has stopped wearing his Apple Watch, but will sleep apnoea detection make him change his mind?
Halide Mark II (2.15)
The ideal app for photographers looking for more manual control
reMarkable 2, Marker Plus & Type Folio
A tablet that gives a note-paper experience
Belkin Auto-Tracking Stand Pro
Get your iPhone to follow your every move!
AirPods 4 with ANC
A new design and Active Noise Cancellation make these a must-have
iPhone 16 Pro
Bigger and better in almost every way - and with power to spare