How does solar power bank work?

Solar-Charged Power Bank. They have photovoltaic panels which can trickle-charge the internal battery when placed in sunlight. Solar charging isn't fast, so they can usually charge via cable as well. ... We most often see Power Banks use a Mini or Micro-USB socket for charging, and full-sized USB sockets for discharging it charges your mobile phone, pds, digital camera, ipod etc .Buy online click here