  In this work, we investigate a spherically symmetric charged black hole in
the presence of a Kalb--Ramond field background. We calculate the photon sphere
and shadow radii and, corroborating our results, we constrain them from
observational data from the Event Horizon Telescope (EHT), particularly
focusing on the shadow images of Sagittarius $A^{*}$. Additionally, we analyze
the greybody factors, emission rate, and partial absorption cross section. We
also examine the topological charge and its application to the deflection
angle. Finally, we conduct the analysis of the heat capacity and phase
transitions.
