usb power Increasing USB charge Speeds

[R_M_M]

Hi,

I'm looking for a way to increase the power supplied by the USB port in my car to increase the charge speed of my mobile phone.
My car has two USB ports connected to a wireless charging pad that is capable of charging up to 15w if it receives enough power.

I experimented with adding a power bank to increase the charge speed however on most power banks either the power needs to be disconnected to stop charging the power bank or a button needs to be pressed on the power bank.
In addition the power bank if connected to the car USB will only supply the same input power to the phone as the car delivers into the battery.

 

I have thought about using a solar battery controller as most of these allow you to charge a 12v battery and discharge form a USB port on the controller however I am a little unsure if this will work and it seems like quite a clunky solution.

I don't have the confidence to drill a hole in my centre console to run a cable from the 12v leads under the dashboard so any simpler suggestions would be much apricated.
The power from the USB ports stays on for a substantial amount of time when I lock and leave my car which should be sufficient to charge any battery.

Further information:
Car is a UK Tesla Model 3 Right Hand Drive Performance 2019.

 

[Obioban]

Does the Tesla have a cigarette lighter? Getting a USB adapter for that is probably your easiest option.

 

BTW, if that wireless charging pad is magsafe, you need an 18w(+) charger that supports USB PD to get 15W out of it.

[R_M_M]

16 hours ago, Obioban said:

Does the Tesla have a cigarette lighter? Getting a USB adapter for that is probably your easiest option.

 

BTW, if that wireless charging pad is magsafe, you need an 18w(+) charger that supports USB PD to get 15W out of it.

Hi,

The charger is not magsafe and I don't have an iPhone.

There is a cigarette lighter but no where near rhe wireless charger.

For me to use the cigarette lighter there is a whole load of removing car trim and unscrewing the centre storage unit.