  Galactic charged cosmic rays (notably electrons, positrons, antiprotons and
light antinuclei) are powerful probes of dark matter annihilation or decay, in
particular for candidates heavier than a few MeV or tiny evaporating primordial
black holes. Recent measurements by PAMELA, AMS-02, or VOYAGER on positrons and
antiprotons already translate into constraints on several models over a large
mass range. However, these constraints depend on Galactic transport models, in
particular the diffusive halo size, subject to theoretical and statistical
uncertainties. We update the so-called MIN-MED-MAX benchmark transport
parameters that yield generic minimal, median and maximal dark-matter induced
fluxes; this reduces the uncertainties on fluxes by a factor of about 2 for
positrons and 6 for antiprotons, with respect to their former version. We also
provide handy fitting formulae for the associated predicted secondary
antiproton and positron background fluxes. Finally, for more refined analyses,
we provide the full details of the model parameters and covariance matrices of
uncertainties.
