  Quantum battery (QB) is the miniature energy storage and release device and
plays a crucial role in future quantum technology. Here, an implementation
scheme of a QB is proposed on a superconducting circuit which is composed by
$N$ coupled transmon qubits and a one-dimensional transmission line resonator.
We derive the Hamiltonian of the QB system and investigate its charging
performance by considering three decay channels. We find that the presence of
the decay channels suppresses the high oscillation of the energy storage
process, thereby realizing a stable and powerful QB. In particular, compared
with the resonator decay and the qubit relaxation, the qubit dephasing shows a
counterintuitive advantage in our QB. We show that the nearest neighbor
interaction always have a positive impact on the stable energy and the coupling
only significantly influences the maximum charging power in the fully
nondegenerate ground state region. We also demonstrate the feasibility of our
approach by evaluating the QB performance under experimental parameters.
