I made a video about the fibre X a few days back and someone had this to say.

No talk say stable... if light no Dey how we wan take use I MADE A VIDEO ABOUT THE FIBRE X A FEW DAYS BACK SOMEONE HAD THIS TO SAY. WELL THE TRUTH IS THAT THE FIBRE X CANNOT WORK WITHOUT ELECTRICITY. SO IF NEPA TAKES THE LIGHT NOW THE FIBRE X GO OFF. BUT THERE'S A WORK AROUND TO THIS. YOU CAN EITHER USE A UPS OR IN MY CASE USE A POWER BANK. I'M USING THE ITEL POWER GO TO POWER MY FIBRE X AND IT'S WORKING JUST FINE. THIS GUY IS A MONSTER MAN IT CAN POWER MY FIBRE X FOR DAYS WITHOUT INTERRUPTION AND THAT WORKS FOR ME. OR IF YOU DON'T HAVE THE POWER GO YOU CAN ALWAYS USE A NORMAL POWER BANK LIKE THIS. AS LONG AS IT HAS AN OUTPUT OF 5 WATTS MINIMUM IT SHOULD WORK. JUST GET A SUPPORTED CABLE LIKE THIS ONE HERE. SO AS YOU CAN SEE THIS IS THE TYPE C TO DC CABLE THIS PART GOES TO YOUR POWER BANK AND THIS OTHER PART GOES TO YOUR FIBRE X IT SHOULD WORK JUST FINE.