  We revisit non-rotating, dyonically charged, and supersymmetric AdS$_4$ black
holes, which are solutions of $\mathcal{N}=2$ gauged supergravity with vector-
and hyper-multplets. Uplifting the near horizon solutions to $D=11$
supergravity on seven-dimensional Sasaki-Einstein manifolds, we show that
dyonic AdS$_4$ black holes correspond to AdS$_2$ solutions with electric and
magnetic baryonic fluxes in $D=11$ supergravity. We identify the off-shell
AdS$_4$ black hole solutions with parameters of $D=11$ AdS$_2$ solutions
without imposing the equations of motion. We calculate the entropy of dyonic
black holes, carefully analyzing the Page charge quantization conditions.
