Dams are a normally a power supply rather than a battery. I was more thinking pumped storage hydro. Which is usually done where theres 2 lakes next to each other at very different heights, so you can “store” power by pumping water up and release by pumping back down.
No, but I will acknowledge where some democratic elements exist within even the DPRK, though they’re very thin and weak.
There are other forms of government that are a better match for describing the DPRK. One party dictatorship, for example.
If you want to apply the same logic to the US, calling it simply an oligarchy rings hollow, though there’s a stronger argument than DPRK+democracy I’ll admit. It’s a democracy with flaws, but those flaws are smaller than the democratic elements they weaken, so it still gets to be called a democracy.