Because MacBook Pro models from 2016 and later have multiple Thunderbolt 3 (USB-C) ports that you can use for charging, you might wonder if plugging more than one AC adapter into your computer will charge it faster.
Using multiple adapters won't speed up charging, because your Mac only draws power from one AC adapter—even if more than one is plugged in. If you do plug in more than one AC adapter, your Mac will automatically select the single best-suited power source and charge from it.
The best way to charge your MacBook Pro with Thunderbolt 3 is to use the AC adapter that came with the computer. Using an underpowered AC adapter, like those that come with iPad, will make charging slower.