  Nonreciprocity, arising from the breaking of time-reversal symmetry, has
become a fundamental tool in diverse quantum technology applications. It
enables directional flow of signals and efficient noise suppression,
constituting a key element in the architecture of current quantum information
and computing systems. Here we explore its potential in optimizing the charging
dynamics of a quantum battery. By introducing nonreciprocity through reservoir
engineering during the charging process, we induce a directed energy flow from
the quantum charger to the battery, resulting in a substantial increase in
energy accumulation. Despite local dissipation, the nonreciprocal approach
demonstrates a fourfold increase in battery energy compared to conventional
charger-battery systems. We demonstrate that employing a shared reservoir can
establish an optimal condition where nonreciprocity enhances charging
efficiency and elevates energy storage in the battery. This effect is observed
in the stationary limit and remains applicable even in overdamped coupling
regimes, eliminating the need for precise temporal control over evolution
parameters. Our result can be extended to a chiral network of quantum nodes,
serving as a multi-cell quantum battery system to enhance storage capacity. The
proposed approach is straightforward to implement using current
state-of-the-art quantum circuits, both in photonics and superconducting
quantum systems. In a broader context, the concept of nonreciprocal charging
has significant implications for sensing, energy capture, and storage
technologies or studying quantum thermodynamics.
