  We study systems in $2+1$ dimensions consisting of defects that source an
electric charge, or a magnetic flux, of a $U(1)$ field, and we use holography
to compute their effects on quantum conformal fields. We can also hide the
defects inside the horizon of a black hole, where they continue to affect the
quantum fields outside. By extending the solutions to braneworld holography, we
find the non-linear backreaction of the quantum fields on the defect and black
hole backgrounds. This gives quantum charged point particles and black holes.
The charged quantum black holes markedly differ from classically charged BTZ
black holes, since the quantum-induced electromagnetic field in $2+1$
dimensions has a better asymptotic behavior than its classical counterpart. The
construction also gives a new class of (near-)extremal charged quantum black
holes with AdS$_2$ throats.
