Anker A2633 Anker NanoCharger PIQ 3.0 Durable Compac (Open Box)

I'll bottom line it for you: It's small and performs well. This is an excellent 18W USB-C PD charger. It's the one you should get for iPhone Charging. When comparing performance to the Apple 18W USB-C Charger included with the iPhone 11 Pro, it gets the same performance but the Anker is smaller. The prongs aren't foldable (on either) but the compact size makes up for it.I noticed I didn't hear the telltale "double chime" you sometimes (but not necessarily always) hear when the phone renegotiates negotiates from 5V to 9V fast charging. Not to worry, I used a USB-C power meter and confirmed that within about two seconds the power output switches to 9V*2A (18W.) Comparing the power output of both chargers was nearly identical. Also when watching the phone charge percentage it increased by about 1% per minute during fast charging. These are the same results I see when comparing to the Apple 18W USB-C iPhone charger.iPhone 11 Pro (Smaller one, not the Max)From 40% to 80%, 20 min. (1% increase per minute linear)From 80% to 90%, 15 min. (Charge rate gradually reduces above 80%)From 90% to 98%, 20 min. (Charge rage gradually reduces as it increases.)Slowing above 80% is normal for all iPhones. It's an operation of the iPhone (not the charger) to reduce battery damage at higher charge rates. Above 80% is generally no longer rapid charging which is the case with all chargers.So to conclude, you get full 18W fast charging below 80% as well as the maximum rate the phone will allow for the remaining 80%-100%.This is the ideal charger to put in your purse or bag and take with you in case you need a big boost and don't gave a power bank with you. I also have a 10000 USB PD Anker power bank that uses USB-C to charge and I'm going to replace the one I use to charge it with one of these because it's so much smaller.The price is a bit of a drag, but you're getting the most compact highest quality charger available. It's costs less than Apple's. Spend a few bucks more and get one of these over a cheap competitor. Hopefully, the price goes down over time.One final note. This is a 5V 2.4A (12W) / 9V 2.0A (18W) USB-C PD charger. It is ideal for a phone that uses up to 18W charging. It does not do higher 12V and 20V power output necessary for some other devices. Larger higher output chargers are available and ideal for those. But this is a perfect compact replacement for a phone-only Apple charger.It should be fine for charging USB-C power banks.