  As an energy storing and converting device near atomic size, a quantum
battery (QB) promises enhanced charging power and extractable work using
quantum resources. However, the ubiquitous decoherence causes its cyclic
charging-storing-discharging process to become deactivated, which is called
aging of the QB. Here, we propose a mechanism to overcome the aging of a QB. It
is found that the decoherence of the QB is suppressed when two Floquet bound
states (FBSs) are formed in the quasienergy spectrum of the total system
consisting of the QB-charger setup and their respective environments. As long
as either the quasienergies of the two FBSs are degenerate or the QB-charger
coupling is large in the presence of two FBSs, the QB exposed to the
dissipative environments returns to its near-ideal cyclic stage. Our result
supplies an insightful guideline to realize the QB in practice using Floquet
engineering.
