The Aukey packaging inspires confidence. The product is well finished and comes with a carrying case. I rebooted my smartphone that has a battery of 2800 mah and increased from 12% to 100% in just 2 hours. The only downside is the battery meter that lacks precision because there are only 4 diodes. However for 20 euros seems to be a good quality / price ratio. Amazon Prime delivery is on time: ordered to 2:45 p.m. ET delivered the next morning.