Normally, it should last for many days. A Li-Ion battery last about 2-3 months, but it depends on the design of the power bank and how much drain is on the battery from the internal circuitry. They should certainly last long enough for anyone to use them for charging their phone for a week or two or more.
Small survey on ROCK SPACE POWER BANK
I just saw Rock Space power bank advertisement on rockspace.in they have 10000 mah,13000 mah and 20000 mah power banks ! in my opinion, its a value for money if we compare with others
Meteroid space rock would be at the top of the moon.
space, it is a rock in space.
McGready's bank is in Rock Ridge
A fallen rock.
rock
A rock takes up volume of space. To know the amount, the size of the rock would have to be known.
meteor
meteor
Space between the particles of the rock.
The bank has to have been blown up and you will find it to the right of the entire Rock Ridge place.