  We explore decay channels for charged black holes with vanishing temperature
in $\mathcal{N}=2$ supersymmetric compactifications of string theory. If not
protected by supersymmetry, such extremal black holes are expected to decay as
a consequence of the weak gravity conjecture. We concentrate on double
extremal, non-supersymmetric black holes for which the values of the scalar
fields are constant throughout space-time, and explore decay channels for which
decay into BPS and anti-BPS constituents is energetically favorable. We
demonstrate the existence of decay channels at tree level for large families of
double extremal black holes. For specific charges, we also find stable
non-supersymmetric black holes, suggesting recombination of
(anti)-supersymmetric constituents to a non-supersymmetric object.
