Charge your Samsung Galaxy A51 with a Samsung A51 charger. Choose a Samsung Adaptive Fast Charge or Quick Charge fast charger if you don't want to wait for long. You can charge your empty battery back up to 40% in only half an hour. Without a fast charger, you can just reach 25% in half an hour. So if you want to leave the house soon but quickly want to charge your device, it's better to have a good fast charger. Choose a charger without cable if you have enough USB-C cables. Do you not have enough sockets to charge all your devices? Choose a charger with multiple USB ports.