Reverse wireless charging transforms some Qi-enabled devices into a power bank for other gadgets. You can charge other devices wirelessly by placing them on your phone’s back. Even though it’s slower at 5W, its usefulness in tight spots is undeniable.
Take the Samsung Galaxy S10 as an example. It can give another phone up to a 10% battery boost in just an hour. However, this comes with a drawback: 60% of electricity is lost in the process. Even though standard wireless chargers work faster, reverse charging is great for an emergency. It helps when you need to power up Qi-compatible gear or give another phone a quick charge.
Understanding Reverse Wireless Charging
Reverse wireless charging turns your device into a wireless charging pad. It uses electromagnetic induction. This tech is perfect for sharing battery power quickly.
How Reverse Wireless Charging Works
It works by electromagnetic induction, using two coils in both devices. When aligned, energy moves wirelessly. The Huawei Mate 20 Pro first introduced it in 2018, followed by Samsung’s S10 series in 2019.
While cables can charge very fast, at speeds like 45W or 120W, reverse wireless is slower at about 5W. This keeps the charging device from getting too hot. To charge, place the phone face down and the other device on top of it.
The Google Pixel 7, for example, charges faster with a wired connection. But, it offers reverse charging at a lower speed. This method works best as a last-resort option.
Enabling Reverse Wireless Charging on Different Devices
Different brands have different ways to turn on reverse charging. For instance:
- Google Pixel users go to ‘Battery’ settings and click ‘Battery Share.’
- Samsung owners find ‘Wireless PowerShare’ under ‘Battery’ in their settings.
Many brands like Honor, Huawei, and OnePlus support reverse charging. Yet, iPhones don’t have this feature, though they can be charged wirelessly. It’s important to use the specific settings each brand recommends.
Devices such as Samsung Galaxy S series and Galaxy Note series show how useful this technology is. Even though it’s slower than wired charging, it’s compatible with many devices. This includes earbuds and smartwatches that use the Qi standard.
What Is Reverse Wireless Charging
Reverse wireless charging lets your smartphone wirelessly give battery power to another device that can charge wirelessly. This cool feature follows Qi wireless charging rules. Companies like Samsung and Google have made it popular.
The Technology Behind Reverse Wellness Charging
This tech works through inductive charging. That’s a way to send energy wirelessly between two things using magnetic fields. It’s like the Qi wireless charging pads. With it, your phone can charge other devices like earbuds, smartwatches, and other phones.
Samsung introduced Wireless PowerShare with the Galaxy S10. It can charge gadgets at 4.5W, which is good for small items but slower for big ones. Google calls it Battery Share on Pixel devices. Xiaomi and OnePlus also have this in their top models.
Comparing Reverse Wireless Charging with Traditional Charging
Reverse wireless charging is different from traditional wired charging. Wired charging, often with USB-C, is quicker and moves energy better. For example, the Google Pixel 7 can charge wirelessly at 23W with a certain charger, while reverse charging goes up to 5W.
Yet, reverse wireless charging offers handiness that cords don’t. It’s great for emergencies or charging Bluetooth gadgets quickly. But, this method isn’t fully efficient. The device getting charged ends up with less battery than what your phone loses.
Using this feature a lot can make devices hot. This might make their batteries not last as long. Despite this, for occasional use and for ease, reverse wireless charging is a key feature in new smartphones. It’s really useful for devices that use the Qi charging standard.
Pros and Cons of Reverse Wireless Charging
Reverse wireless charging is now a hot topic, especially for Samsung Galaxy users and other Qi-enabled devices. It brings a lot of benefits but also has some downsides to think about.
Advantages of Using Reverse Wireless Charging
One big plus is it lets you charge gadgets like AirPods or a smartwatch easily. You don’t need a separate charger for this. It’s great for quick charges in emergencies when you can’t get to a plug.
Google Pixel phones from the Pixel 5 and later offer a Battery Share feature. It lets you share your phone’s power with other devices. Samsung Galaxy phones, starting with the S10, have a similar feature called Wireless PowerShare. You can even set when it stops to save your phone’s battery. It also shuts off on its own if it doesn’t find a device to charge after 30 seconds.
Drawbacks of Reverse Wireless Charging
However, reverse wireless charging isn’t perfect. It’s slower and less efficient compared to wired charging, losing about 50% of power. This loss makes it less ideal, especially if you need a quick charge.
Using your phone as a charger can also drain its battery fast. This can affect how long your phone lasts during the day. For Samsung Galaxy phones, the battery must be over 30% to use PowerShare. The phone turns this feature off if the battery goes below that. On top of that, reverse charging might make the phone get too warm, up to 95°F.
Real-World Examples and Applications
In real life, reverse wireless charging comes in handy when you’re stuck without a charger. It’s useful during emergencies or travel. For example, Samsung phones show a blue light when using Wireless PowerShare, so you know it’s working.
For those without this phone feature, Logitech’s wireless chargers are a good choice. They charge faster, offering up to 9W for Samsung phones. This shows how far wireless charging has come.
Even with its cool features, reverse wireless charging is still more of an extra. It’s not the main way to charge due to the slow speed and quick battery drain. But for Samsung Galaxy and other Qi-enabled phone users, it’s a helpful feature to have for charging accessories and sharing power.
Future of Wireless Charging
Wireless technology is moving fast, making wires for charging look old-school. Companies are working on making charging wireless, quicker, and easier. For example, in February 2023, Xiaomi launched the Xiaomi 13. It introduces a 50W Wireless Turbo Charge, which can charge as fast as wired ones. Plus, it has a 10W Reverse Wireless Charge, turning it into a power bank for smaller gadgets. This makes charging a lot more fun and handy.
Innovations in Wireless Charging Technology
Wireless charging is getting better thanks to new battery ideas and better use of electromagnetic induction. One big step is Over-the-Air Charging (OTAC), like Wi-Charge’s Gen2 receiver from December 2022. It charges devices without them needing to touch, making charging simpler and more flexible. Also, for electric vehicles (EVs), there’s progress. Electreon and VINCI Highways joined hands in July 2023. They’re working on charging EVs wirelessly on public roads in Germany. This supports eco-friendly transport and better charging for the growing EV crowd.
Potential Improvements and Market Trends
Future upgrades in wireless charging aim to make it faster and more convenient. With 280 million EVs expected worldwide by 2040, according to the International Energy Agency (IEA), good EV charging is a must. Wireless charging might become more popular because of its ease and continuous improvements. These changes aim to fix today’s issues, making this tech useful for everyone.
Electric vehicles could soon charge wirelessly with power from 1 kilowatt to 300 kilowatts. There are concerns about slow charges and safety with electromagnetic fields (EMF). But, with ongoing research, these worries are being addressed. Future wireless charging looks promising. It aims to be powerful, inventive, and accepted more widely for both personal and public needs.
Conclusion
Reverse wireless charging is an exciting new step in how we power up devices. Although it’s mainly in expensive phones now, its use is growing. It’s great for quick charges of smaller gadgets like earbuds and smartwatches. The HONOR 90 phone is making this tech available to more people.
Using reverse wireless charging can make life easier, especially when traveling. It means you don’t need to carry so many chargers. This cool tech also supports using less chargers. That’s good for the planet. But, using it too much might wear out your battery faster and cause overheating.
Looking ahead, the future of wireless charging looks bright. More and more companies are adding this feature to their phones. With better technology, reverse charging will get even more efficient. We might soon see it as a key way to keep our devices powered.
