  In a Dark left-right gauge model, the neutral component of right-handed
lepton doublet is odd under generalized R-parity and thus the lightest one
serves as the dark matter (DM) candidate. The coannihilation of the dark matter
with the singly charged Higgs triplet produces the correct relic abundance. We
explain AMS-02 positron excess by the annihilation of 800 GeV dark matter into
$\mu^+\mu^-\gamma$, through a t-channel exchange of the additional charged
triplet Higgs boson. The DM is leptophilic which is useful for explaining the
non-observation of any antiproton excess which would generically be expected
from DM annihilation. The large cross-section needed to explain AMS-02 also
requires an astrophysical boost. In addition, we show that the muon $(g-2)$
receives required contribution from singly and doubly charged triplet Higgs in
the loops.
