iClever BoostCube Dual Travel Charger
Another option is the iClever BoostCube. They make some of the best-selling chargers on Amazon, which are popular for having foldable prongs.
Basically, the iClever BoostCube features two USB ports so you can fast charge the Galaxy S9 and one other device. Both ports use fast charging technology, and SmartID to accurately deliver the right amount of power to each device.
Our favorite aspect of the BoostCube is the fold-away prongs making it perfect for traveling. Fold them up and quickly throw them in your bag or purse and you're all set.