The Event Horizon of a Negative Charged Black Hole

The black hole charge only affects charged particles on the outside of the event horizon. So it prevents more electrons from falling in, but doesn't prevent photons or other positively charged particles from falling in. But there's another outcome which is super weird, which is that black holes can repel each other. And if they had enough charge, they would avoid falling in together. You might even get them into like a stable configuration where these two forces are in balance and they could orbit each other.