There are models that charge 60 percent in 30 minutes. The solar battery bank is good because you don’t need wires, the only problem is that it’s better not to use the phone while the phone is charging, because it will speed up the charging. I have a normal powerbank, I always have to take a cord and I can only charge my phone 4 times, then I have to charge the powerbank again, imagine if there is no socket, what will you do with an empty powerbank.