In the final episode of Black Lightning,
Jen confronts her double from the ionosphere.
She lights herself up with radioactive energy and zooms at the doppelganger, and when the energy dissipates, the doppelganger is gone.
What did she do to her? Did she kill her double? I would not expect her to be incinerated so easily, since her powers are similar to Jen's. Did she absorb her somehow? Drive her off to the ionosphere?