ESKOM LOADSHEDDING darkness? NO PROBLEM with ELLIES LED RECHARGEABLE LIGHTBULB... or is it?

RECHARGEABLE LIGHT BULBS for sale here: https://amzn.to/3JwMm3J
Ellies made this rechargeable lightbulb that stays on even when there is loadshedding or any kind of power failure. I test it out, but unfortunately I'm disappointed. I liked the idea anyway but their product still needs improvement.