I am useing this power bank for my phone S9 plus with 3000mAh battets , this power bank of mi charges it in 45min to 1hr duration with full charging of power bank it charges my S9 plus 4times , buy this you guys might have got idea about its battery life , it has dual out put and an LED indicater to indicate percentage of charge Mi tell about some intelligent power output I really don't know what itis I never noticed any difference .
Its pretty stylist with a simply design and solid built quality , its best power bank in this price range I am regularly using it from past 6months and never noticed any issue