Is there any practical limit to how much energy a device like this can buffer before springing into action? I&#x27;m just curious if it would be possible to quickly leech enough to power a peripheral like a solenoid, or at least ensure enough energy is available to complete whatever computation the device is intended to perform<p>(Vaguely imagining a completely unpowered electronic lock, and a handheld &#x27;key&#x27; that I guess would contain a fairly beefy battery)