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You're stuck with 5V at half Amp. Fast charging allows up to several Amps, but needs data pins to negotiate.

Higher power versions of this concept exist that do the data negotiation for your device in response to negotiation from your device. "Plugable USB Universal Fast 1A" is one example, though in my experience, really using it is hit or miss.

I've had better luck using a USB battery to "filter" USB connections in random rental cars.

I have a dollar store "iPad fast charging plug" which is basically a USB condom with a dumb resistor divider to tell Apple devices that they're safe to pull 2.4A.

I have a device that mimics data pins while cutting them off internally. My phone charges quickly, but data lines are not connected. It's a Triplett Usb Bug, a mainstream brand product.

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