  A quantum system which can store energy, and from which one can extract
useful work, is known as a quantum battery. Such a device raises interesting
issues surrounding how quantum physics can provide certain advantages in the
charging, energy storage or discharging of the quantum battery as compared to
their classical equivalents. However, the pernicious effect of dissipation
degrades the performance of any realistic battery. Here we show how one can
circumvent this problem of energy loss by proposing a quantum battery model
which benefits from quantum squeezing. Namely, charging the battery
quadratically with a short temporal pulse induces a hyperbolic enhancement in
the stored energy, such that the dissipation present becomes essentially
negligible in comparison. Furthermore, we show that when the driving is strong
enough the useful work which can be extracted from the quantum battery, that is
the ergotropy, is exactly equal to the stored energy. These impressive
properties imply a highly efficient quantum energetic device with abundant
amounts of ergotropy. Our theoretical results suggest a possible route to
realizing high-performance quantum batteries, which could be realized in a
variety of platforms exploiting quantum continuous variables.
