How Anker PowerIQ works technically – simplified.

How Anker PowerIQ works technically – simplified.
(Video version: 3.0).

Transcript:

If there is anything unclear about the following video, or if you have suggestions, do not hesitate to comment!

This video explains the basic principle behind Anker PowerIQ.

PowerIQ two point zero actually includes the voltage negotiations of Qualcomm Quick Charge version two point zero and three point zero.

But if it detects that the device does not support Quick Charge, it can still help the device charging as fast as possible.

Because every cable has impedance, also known as electrical resistance that increases proportionally to the electrical current, the voltage that arrives at the end device's charging port is lower than the voltage at the power supply.

A Lithium-Ion battery requires at least four point three volts to charge fully or at the highest possible speed, but most consumer electronics do not own a voltage boosting circuitry for power input, only for USB-OTG output. Therefore, the limited voltage that arrives at the phone's charging port will significantly reduce the charging speed.
Not only because Lithium-Ion batteries require a minimum voltage, but also because a dropped voltage is an indication of a weak power supply being at full usage already, and when not using any method of negotiation, or only passive methods such as shorted USB data lanes that indicates indefinite charging speeds, the mobile phone can not be sure how much current a charger can deliver.


Many USB chargers keep outputting the exact same voltage throughout their entire current range.

But Anker PowerIQ simply increases the voltage proportionally to the current by around zero point two volts to zero point three volts per ampère, so that the spare voltage compensates for the voltage drop.

Although the power bank does not know which voltage arrives at the USB port of the device, it is able to make a rough guess by knowing the resistance of an average USB cable.

Overcompensating the voltage in the exact same moment as the device has detected the charger and starts drawing current makes the device believe that the charger can deliver power to spare, therefore drawing out as much current as supported by the device at the given voltage.

That is the simple principle that powers Anker's PowerIQ.

As already said, if there is anything unclear about the preceeding video, or if you have any suggestions, do not hesitate to leave a comment!

Thanks for watching.
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Background music: Ehrling – Memories (screw the YouTubers who don't mention it in their video descriptions)
YouTube Mirror: https://youtu.be/QTwSlFKJJAo