  The storage and transfer of energy through quantum batteries are key elements
in quantum networks. Here, we propose a charger design based on transitionless
quantum driving (TQD), which allows for inherent control over the battery
charging time, with the speed of charging coming at the cost of the internal
energy available to implement the dynamics. Moreover, the TQD-based charger is
also shown to be locally stable, which means that the charger can be
disconnected from the quantum battery (QB) at any time after the energy
transfer to the QB, with no fully energy backflow to the charger. This provides
a highly charged QB in an always-on asymptotic regime. We illustrate the
robustness of the QB charge against time fluctuations and the full control over
the evolution time for a feasible TQD-based charger.
