Choose a Power Delivery fast charger and charge your smartphone extra fast. Use a 20W USB-C fast charger and charge your smartphone to 50% in half an hour. You can charge your Samsung smartphone to 40% in 30 minutes with any fast charger. With a 25W Samsung fast charger or a BlueBuilt charger, you can charge even faster. You can charge to 60% in half an hour. You can fast charge certain Android devices with a Quick Charge fast charger, especially older models.