QuickCharge 3.0. Quick Charge 2.0 (12V) Samsung Galaxy S21 Charging Power. 15W via Quick Charge 2.0. If you have an old phone charger that supports USB Power Delivery, Quick Charge 3.0, or Quick Forthe iPad and iPad Mini, you use a 20W Power Delivery fast charger. It charges your iPad 2 times faster compared to when you don't use a fast charger. You can charge your iPad Pro and iPad Air even faster with a 30W iPad Pro charger. A full charge takes 2 hours, instead of up to 10.5 hours when you don't use a fast charger. Manyare barely larger than the 12V socket itself, yet have one or two USB ports for powering or charging two devices at once. Because USB chargers tend to deliver 5V, the 12V available from the Amperereturns an mA (milliampere) value at the top, including a minimum and maximum number as well as an average charge. Now you have the numbers to do a little calculating: Watts = Volts X Amps Ifyou have a 13 Pro Max and want to fill up its massive battery as fast as possible, you may want to look into getting a 30W charger that, according to tests cited by @duanrui1205, can charge it FastCharger,Foldable,Foldable Charger: Color: Arctic White: Input Voltage: 240 Volts (AC) Mounting Type: Wall Mount: MFi Certified Charger for Apple iPhone 14 13 12 11 X Xs Pro, Pro Max, Plus, iPad, 6 Foot, Black Anker USB C Charger 40W, 521 Charger (Nano Pro) 2-port. Solid build quality, space saving way to fast charge two devices up .

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