Why Are Wireless Chargers So Slow?
Gen I & Gen II
Gen I Wireless charger
Wireless charging sounds great, right? Just plop your phone on a stand and voila, it starts charging. No cables, no fuss.
Secondly, wireless chargers are slower than wired chargers. The thing about wireless charging is it uses something called electromagnetic induction, basically transferring energy from one place, like your charging mat to your mobile phone.
Wireless charging uses two physical coils. The induction coil in the charger and the receiver coil in the phone. If you don’t align the two coils on top of each other, your device won’t charge correctly. This method of charging is slower than plugging your phone straight into an outlet, which lets the power flow from the outlet through the wired charger to your phone.
Its more like this (depicting how it charges the phone)
By cable it is — Pooooooooooooooooooowooooooooooooooooooower (Continuous)
By wireless charging — Po o o o o o o o o o o o o w o o o o o o o o o o o o o e r (Discrete)
- In the traditional cable charger, the charging brick does all AC to DC conversions and hence you get to charge your phone much faster.
- Whereas in the wireless charging, the coils in the phone as well as the charging mat are pulsating between the polarities. So there are losses and hence not that efficient.
Lets learn how wireless chargers work
Wireless chargers send power to your phone through magnetic induction and magnetic resonance. Or, in layman’s terms, wireless chargers pull electricity from your outlet, run it around a coil, and generate a magnetic field. This magnetic field interacts with a coil in your phone to generate an electrical current, which your phone uses to charge its battery.
Second Generation Wireless Chargers
- They are getting faster compared to Gen I. Great!
In terms of performance, output up to 20W of power — enough for regular speed charging (typically 5W), Samsung’s 9W quick-charging, and Apple’s own 7.5W iteration.
Xiaomi 20W Smart Wireless Charger has a physical motor which will find the phone after you place it on the pad. Quite Interesting.
PS. Air power remains a dream!
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- Great things happened this month.
- Cut negative things, people, thoughts.
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