  Using the full Belle Upsilon(5S) data sample of 121 fb^-1we have measured
exclusive branching fractions for the decays B_s^0 -> D_s^(*)+D_s^(*)-.
Assuming these decay modes saturate decays to CP-even final states, the
branching fraction determines the relative width difference between the CP-odd
and -even eigenstates of the B_s.
