We all know pulling the plug on a running PC is bad, bc the operating system could be in a critical process and interrupting it would corrupt the system.
But using a capacitor that holds electric charge couldnt we give the PC a couple of „grace seconds“ where the pc finishes its job and then starts the shutdown process?
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Capacitors are nowhere near batteries when we’re talking about how much energy they can store. They’re used for really really brief dips in power, but not really for something that needs to run for a while.
There is an exception to this, and that’s ultracapacitors. Some devices like dashcams use them so if the power gets disconnected or the battery dies, it has time to shut itself down. That said, it’s still nowhere near the capacity of a battery. It’s a lot more than a normal capacitor though.
What you’re talking about already exists. They’re called UPS’s. It stands for uninterruptible power supply. they usually have capacitors in them too, and they’re used for two things. first, they help fill in the gaps for when the voltage coming out of your wall dips lower than it should, but more improtantly, if power goes out, it gives your relay time to switch to the battery. relays are fast, but the capacitors have enough charge to handle the brief time for it to switch
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