What immediately struck me was the small size of the battery as well as its light weight, I can even have the phone and battery in the back pocket of my pants (as on my other battery was mainly points negative, too big and too heavy).
Operation is intuitive, plug in his usual charger after all lit LED is disconnected, the load setting for the phone is simple and did not require that I open the manual supplied with.
In addition a full charge of the phone puts as much time as loader (1:30 on a Galaxy S3 2013 - original battery) and for one week every day I plug my phone on this battery to give it a boost in day, for now I have not had to charge the external battery. My putting another battery slightly longer to fully charge the phone (2 hours / 2:15)
I therefore recommend that battery over another, I am extremely satisfied and have currently no complaints about this.