Comment by horsawlarway

> and the point of the latter two is that you can “store” energy by upstreaming its consumption when power is available

Are you sure the parent isn't referring to something like a rust (iron-air) battery? Aluminum, Iron, and Magnesium are all viable battery chemistries.

Side note - I'm pretty certain you don't actually need to make contents of a ship explode to easily sink it with explosives.

I'm actually somewhat concerned that between drones and smart mines - we've never had a better chance of completely ruining our ability to do ocean based shipping during combat.