Never suffer from dreaded battery drainage again! Olympia’s Solar Power (SP) series allows you to harness the power of the sun while you enjoy the great outdoors. No sun, no problem. Olympia’s Solar Battery SB5500 is as flexible as you. You can use the sun or plug it in to charge it up. It has a power bank that stores energy for those sunless times. Cell phones, tablets, flashlights, two-way radios or anything with a USB or Micro-USB port will now be able to keep up with you.