You set your phone at night on a wireless charger stand and have a fully charged device when you wake up. No more searching for your cable charger. No more groping for the plugin in the dark. This is the convenience that only wireless phone chargers can offer!
Wireless phone chargers provide a reliable and convenient way to juice up your smartphone, especially when you are outside the confines of your home. It reduces the hassle of physical connectors and cables.
Wireless phone charging has some advantages over the traditional phone chargers. They are more efficient and provide better cost benefits. For smartphones, wireless chargers spell reliable transfer of power and ensure that your device is all revved up.
Wireless charging (sometimes referred to as wireless power transfer) uses the physics of electromagnetic fields to transfer power safely. The charger acts as a transmitting source while the device is a receiving source. No physical connection between the two is required!
How does a wireless phone charger work?
Wireless charging operates on the Inductive Power Transfer (IPT) system, developed on the concept of magnetic resonance. In this process, electric current is transferred between two objects using coils to create an electromagnetic field.
The steps of wireless charging include:
- Conversion of voltage from the mains into high frequency alternating current (AC).
- The alternating current (AC) is a circuit to the transmitting coil. The AC then induces a time-dependent magnetic field in the transmitter coil.
- The transmitter coil then creates a magnetic field in the receiving coil (within a reasonable distance)
- The magnetic field then generates an electrical field in the receiving device. This process of magnetic or resonant coupling is achieved by the vibration of both coils at the same frequency.
- The current flowing through the receiver coil is switched into direct current (DC) by the circuit of the receiver. This in turn is used to charge the battery.
This is how power is safely transferred through an air gap.
Benefits of wireless charging
- You never have to fumble with phone wires.
- The cost of maintenance (replacement of charger) is reduced.
- Ensures safe powering of your device even in sealed condition
- Prevents the corrosion of the inside of your phone through air and water
- Multiple devices can be charged at once using the wireless charger. Hence it is convenient for you and your friends and family.
- Eliminates the debris and sparks that may arise after continuous cable charging
- Greater spatial freedom for your device. Using a wireless charger means that perfect alignment of the phone with the transmitter is not needed. You can move it around and continue using it, while it is charging (as long as it is in the vicinity of the transmitter) .
The flipside is that wireless chargers trade speed for convenience. Your wall charger is a better option if you need your device to get juiced up fast.
However, the techno giants are working to fine tune the wireless chargers, and they may become the next big thing in the smartphone industry.
How do I know if my gadget can be charged wirelessly?
The leading standard worldwide for wireless charging technology is Qi, is the brain-child of the Wireless Power Consortium. Today it is used by more than 900 products across the globe.
To use most wireless chargers, your smartphone must be Qi compatible. The Qi logo is easily visible on the device or its packaging.
The icon is easily identifiable. It is a Q-shaped magnifying glass which focuses on the ‘I’. Qi wireless charging packs can work with phones, tablets, Bluetooth, cameras and even some watches.
Power Matters Alliance (PMA), which merged with Alliance for Wireless Power (A4WP), is another accepted wireless charging standard. It is recently pushing a new product called Rezence.
Even for those brands which do not have a wireless charging feature, you can have external charging cases as add-ons. This enables these devices to be wirelessly charged.
How can you set up wireless phone charging?
You just have to plug the wireless charger into a wall outlet (only single wire required). But no cable is required between the charger and your phone.
Then place your smartphone on the charging pad to get those electrons flowing. An indicator light tells you when the device is charged.
Some of the leading wireless chargers include:
- Anker PowerPort Qi Wireless Charging Pad
- Ikea NORDMÄRKE
- Spigen F300W Wireless Charger
- Samsung Fast Charge Wireless Charging Stand
- Samsung Fast-Charge Qi Wireless Charging Pad
- Incipio Ghost 210
- Incipio offGRID Ghost
- ZOER Qi Wireless Charger
- TYLT VU
- Belkin Qi Wireless Charging Pad
- Kroma Wireless Charging Pad
- Ikea Selje
- Choetech Iron Stand wireless charger
- Montar Air Car Mount
- Itian Charging Stand
Phones that support wireless charging
Many modern smartphones are adapting to wireless charging. A few of these phones may require special back plates to achieve wireless charging, but they officially have integrated wireless charging support.
Here is a list of them:
- HTC Droid DNA
- HTC Droid Incredible 2
- HTC Droid Incredible 4G LTE
- HTC Rezound
- LG G3
- LG G3 Cat 6
- LG G3 Prime
- LG G4
- LG Optimus G Pro
- LG Optimus G Pro 2
- LG Optimus
- LG Spectrum
- LG Lucid 2
How long does it take to charge using a wireless charger?
It takes around three hours to fully juice up a discharged smartphone using a wireless charging pad. However, Samsung’s “Adaptive Fast Charging” consumes around two hours to charge the same device.
With the consistent advancements being made, wireless charging is likely to become more convenient and user friendly.
The radical development in magnetic induction capabilities will continue to increase the appeal of wireless phone charging for consumers, while built-in transmitters make it easier than ever to recharge your phones while you are on the go.