Item arrived as described, lightly but safely packaged, delivered ahead of promised time. The built-in battery was connected to a standard USB-C 5V power adapter and fully charged in about 90 minutes. The charge-level indicator shown 100%. I then used the jump starter to power a 2.5-liter gasoline engine- in a 2007 Saab 9 5- and it did the job with no hesitation. Afterwards, the charge level indicator showed ~93%, which was expected. I also used the item to power my large-screen Lenovo laptop, which it did for almost a full day's work, further dropping the charge level to 78%. The item is now fully charged, is safely packaged in its convenient pouch- along with jumpstarter alligator clips and additional USB-A/C cables- and stored in the boot of my car. I will consider this seller for my future needs in this area.