Pi Charger Uses Qi Standard to Extend Wireless Charging Reach Beyond Current Mats

With the launch of the iPhone 8 and iPhone X, Apple added inductive wireless charging support to its mobile devices for the first time. While the feature brought Apple's phones up to speed with existing Qi-compatible charging standards, the announcement fell short of some expectations that this year Apple would introduce technology allowing iPhones to be powered wirelessly at a distance, rather than having to use a charging mat.

However, Pi is a California-based startup that aims to break from that limitation with the Pi Charger – a cone-shaped tabletop device that combines Qi-based resonant induction with a special beam-forming algorithm that allows it to charge multiple devices within about a foot in any direction.

Pi charger
The Pi might not reach the distances claimed by Energous' WattUp technology, which uses radio frequencies to charge devices from up to 15 feet away, but it does offer more flexibility than existing pads that devices must be directly placed upon.

In a demo at TechCrunch's Disrupt event, the company showed that up to four Qi-compatible devices can be placed within a foot of a Pi and they will start charging. Devices can be located anywhere within a 12-inch sphere of influence around the charging hub and in different orientations. The closer the device to the Pi, the faster it charges, with a gradual drop-off in charging speed the further away the phone is.

"Magnetic fields are the best way to send meaningful energy to phones, tablets, and other portable electronics," said Lixin Shi, Pi's CTO and co-founder. "The hard part was figuring out how to make magnetic charging more flexible, multi-device, and extend its useful range. It took us over a year to complete the mathematical proof that makes it all possible."

The team behind Pi said they've yet to settle on an exact price for the charger, but they expect it to ship for under $200 sometime in 2018. As for Apple, there is plenty of anecdotal evidence to suggest it has partnered with Energous to work on bringing a truly wire-free, over-the-air charging technology to its consumer devices, but we'll likely have to wait for at least another year to see the possible fruits of those labors.

Related Forum: iPhone

Popular Stories

iOS 18

iOS 18.4 Will Include These New Features for Your iPhone

Wednesday February 5, 2025 7:15 am PST by
iOS 18.3 was released last month, so the first iOS 18.4 beta should be coming soon. iOS 18.4 is expected to be a more substantial update for the iPhone, with several new features and changes related to Apple Intelligence and beyond. Apple's website suggests that iOS 18.4 will be released in April, following beta testing. Below, we outline what to expect from the update so far. Apple...
General Apple Invites Feature

Apple Launches New 'Invites' App

Tuesday February 4, 2025 8:00 am PST by
Apple today announced the launch of a new app called "Invites," which is designed to allow users to plan events like birthday parties, graduations, vacations, baby showers, and more. "With Apple Invites, an event comes to life from the moment the invitation is created, and users can share lasting memories even after they get together," said Brent Chiu-Watson, Apple's senior director of...
App Store vs EU Feature 2

Apple Says It Doesn't Approve of EU Porn App

Monday February 3, 2025 1:15 pm PST by
Apple does not approve of the "Hot Tub" pornography app that was released for the iPhone in the EU using alternative app distribution, Apple said in a statement to MacRumors. Further, Apple is concerned about the potential user safety risks with a pornography app, and says that it undermines consumer trust in the Apple ecosystem. We are deeply concerned about the safety risks that hardcore...
maxresdefault

An Apple TV Refresh is Coming in 2025 - Here's What You Should Know

Wednesday February 5, 2025 10:17 am PST by
Apple hasn't refreshed the Apple TV since 2022, but rumors suggest that we're finally going to get an update in 2025. We don't have a full picture of what to expect yet, but we have some hints on what's coming. Subscribe to the MacRumors YouTube channel for more videos. Updated A-Series Chip The current Apple TV 4K uses the A15 Bionic chip that was in the iPhone 13 lineup, and it's time for...
applecare apple care banner

Apple Raises Monthly AppleCare+ Subscription Price for All iPhones

Tuesday February 4, 2025 9:35 am PST by
Apple this week increased the prices for its monthly AppleCare+ subscription prices for the iPhone, raising the cost by 50 cents for all models in the United States. Standard AppleCare+ for the iPhone 16 models is now priced at $10.49 per month, for example, up from the prior $9.99 per month price. The 50 cent price increase applies to all available AppleCare+ plans for Apple's current...
iCloud General Feature Redux

'Apple Invites' Leaked on iCloud Website

Tuesday February 4, 2025 7:11 am PST by
Update: The new Apple Invites app has officially been announced. The main iCloud.com page has seemingly confirmed Apple's rumored invites tool, which has yet to be officially announced by the company. The page says "Apple Invites" will be an iCloud+ feature:Upgrade to iCloud+ to get more storage, plan events with Apple Invites, and have peace of mind with privacy features like iCloud...
disney

Disney+ Loses 700,000 Subscribers Following Price Increase

Wednesday February 5, 2025 3:34 pm PST by
Disney+ lost 700,000 subscribers worldwide in recent months, according to Disney's earnings results for the first quarter of 2025. Disney said it now has 124.6 million Disney+ subscribers, a decrease of 0.7 million compared to its subscriber numbers in the fourth quarter of 2024. The drop in subscribers comes after Disney+ prices increased in the fall. Disney+ with Ads went from $7.99 to...
maxresdefault

Testing Apple's New Invites App for Event Planning

Tuesday February 4, 2025 10:26 am PST by
Apple today surprised us with a new Invites app, which is designed for planning events like birthday parties, vacations, and baby showers. We checked it out in our latest video to see how it works, what you can use it for, and to demonstrate all of the different features in the app. Subscribe to the MacRumors YouTube channel for more videos. Invites is a standalone app that you can download...

Top Rated Comments

PortableLover Avatar
96 months ago
Now this is a step in the right direction.
Score: 33 Votes (Like | Disagree)
Naaaaak Avatar
96 months ago
Not a single mention of health risks... that's reassuring.
We'll find out it somehow causes cancer in 20 years.

After congressional testimony from expert witnesses saying it doesn't.

After countless articles assuring us it's "safe".

Only admitted once a bunch of people are affected.
Score: 11 Votes (Like | Disagree)
trifid Avatar
96 months ago
Not a single mention of health risks... that's reassuring.
Score: 10 Votes (Like | Disagree)
borgqueenx Avatar
96 months ago
And suited for current iphone 8's and x's! This is awesome tech and hope to see this become a reality!
Score: 9 Votes (Like | Disagree)
Born Again Avatar
96 months ago
One wonders if this will effect sperm count.

Are there any studies on this BruckU?
Score: 8 Votes (Like | Disagree)
JaySoul Avatar
96 months ago
1) There really seems like other problems in the world vastly more important than this

2) Cancer cancer cancer cancer cancer
Score: 6 Votes (Like | Disagree)