This is an incredible portable charger!! At 18W/20000 mAh it's very powerful too. I have very easily replaced my previously well loved portable charger, that was only 10000 mAh but I still loved it and it served me well. So I upgraded to this 20000mAh charger and very quickly fell even more in love with it then my previous one. It's a nice convenient size for carrying with you. Its roughly the size of your smartphone. Its comes with a lovely cloth carrying case with drawstring closure at the top of the bag. It also comes with an included USB to USB type c cord, which is also very convenient to have and carry in the pouch with the charging bank. This powerful charger will charge my galaxy s9 about 5 times (on average) to JUST ONE FULL CHARGE OF THE CHARGING BANK!! I find this extremely helpful. Its is also "Fast-Charging Capable. This power bank charges my galaxy s9 phone (to a FULL charge) in about 30min on average. It is also powerful enough that it seamlessly charges my sons tablet as well to a full charge in about 45min. Making this charging bank a great convenience to me. And with a $40 price point I feel this purchase is a HUGE "bang for your buck" plus it adds a great convienvce to your life and travels. No more worrying about dead devices while you are travelling or out and about running errands. I definitely reccomend this purchase.