It is my understanding that most non-fast charging USB phones and devices can charge at a max rate of 2A and 5V from a USB socket.
If that is the case, what are the requirements to get faster than 0.5A charging which is standard on most USB 2.0 devices?
The reason I ask is because I am building my own power bank with 4 non-fast charging outputs but would like the ability to charge a device at its maximum rate will keeping the output voltage 5V.
Currently I am using short (20 cm) 24 AWG wires to wire up the USB plugs and very short and high quality USB cables to charge my Galaxy S10 but I am only able to charge it at around 500 mA when almost empty while a regular 2A USB wall charger could provide it with such current levels.
Is there some kind of handshaking process to allow for faster charging rates that I am not aware of?
