Can anyone tell me if i can get fast-charging on the X Compact using the USB-C wall charger from the Lumia 950? It is rated to 3amp, but i have no idea how this translates to a charge-time on the X Compact.
I've done a bit of testing, and doesn't seem to charge very quick after all, so the fast feature on the L950 was probable proprietry and doesn't provide quick charge. Never mind.
I'd suggest one of the new breed of "Smart Chargers" that have variable voltages and amperages available. They communicate with your phone to regulate output so it matches what your phone wants.
I've been getting great results from a couple different Aukey units for myself and my wife over a variety of devices. Currently, my X laps up juice pretty fast via an Aukey through the USB C port on the charger and a C<->C cable with a C<->micro adapter at the phone end. The phone doesn't get hot and I recently did a spot check where I was getting over 1.3% per minute during a 20 minute top up.