What is Wireless charging technology :
Wireless charging is essentially the transmission of an electrical current from a power source to a receiving device without the use of a physical connection. The electrical current is then used to charge or re-charge the battery of the receiving device. In this circumstance the receiving device can be anything from a smartphone or wearable, to a large industrial forklift.
How does wireless charging work?
Wireless charging, also known as inductive charging, is a convenient and fuss-free way to power up your smartphone.Wireless, or “inductive,” charging uses electromagnetic and magnetic energy to wirelessly power your mobile devices. Simply set your phone on the charging pad, which will detect the presence of your device and communicate with your phone’s charging case to transmit electromagnetic power.
Wireless charging works on the principle of electromagnetic induction. Coils of wire in the base station (the charging plate) create a magnetic field as the current passes through. This field can induce an electrical current in an adjacent coil of wire without actually touching it. If this wire is part of a battery charging circuit,then you have wireless charging. Keep a wireless charging station at home, in your car or at work to stay juiced up on the go.
Competing standards :
Wireless charging is becoming more and more common. You can buy phones with wireless charging coils inside them, purchase wireless charging mats from tech stores, and businesses like Starbucks are beginning to roll out wireless chargers, so you can put your smartphone down on the tablet and recharge it while you drink a coffee.
The standards are designed to ensure that devices and wireless chargers from different companies can work together. There are three standards: Qi, PMA (Power Matter Alliance) Powermat, and A4WP (Alliance for Wireless Power). Things are very much in flux at the moment. For example, Google currently backs Powermat’s PMA technology. However, Google’s own Nexus 4 and its wireless charger use the Qi standard because it’s manufactured by LG. However, LG has also now joined the PMA.
How You Can Use Wireless Charging Today :
To use wireless charging with a smartphone, you’ll need a smartphone that supports wireless charging and a wireless charging mat to place the device on.
Popular smartphones that support wireless charging include:
1. Google Nexus 4
2. Samsung Galaxy S4: You’ll need an official “wireless charging cover” that replaces the Galaxy S4’s back panel.
3. HTC Droid DNA: Other HTC phones, like the new HTC One, do not have wireless charging support.
4. Nokia Lumia 920 and Lumia 820
5. Apple iPhone 5 : Wireless charging is not included in the iPhone 5, but you can buy a Powermat case that adds wireless charging capability to your iPhone.
6. Apple iPhone 6
All of the above smartphones use the Qi standard, except from the Apple iPhone 5 case made by Powermat, which uses Powermat’s own standard. Be careful when purchasing a wireless charger mat to ensure it works with your smartphone. While wireless chargers are supposed to work with all certified smartphones supporting the standard — a Nexus 4, which uses the Qi standard, is supposed to work with all Qi chargers — some users have been dismayed to find that their Nexus 4 doesn’t work with certain Qi chargers. These are early days for the smartphone wireless charging, and it appears the standards still have some kinks to work out.
What’s the future of wireless charging?
At the moment, wireless charging is still in its infancy. If you’re using the technology, you may well have a wireless charger on your bedside table or your desk at work, but elsewhere you’re probably using a plain old cable. This is likely to change as the technology becomes more popular.
2016 is the year in which the updated Qi standard will be seen in new products. The new 1.2 version of Qi mean the low power found in first generation chargers will soon triple to 15w. Meaning the charging time for a smartphone will drop from three hours to just 80 minutes.