Batteries
What defines a battery?
The Electrochemical Battery
The standard battery of the contemporary era: rechargeable. These enabled the small, portable technologies of the early 21st century, and were used in the earliest teleindexers.
A number of various technologies filled this role, from nickel-cadmium cells in the late 20th to the sodium-sulfur cells of the early 21st. Ultimately, these batteries did not pass the “longevity test” and were largely phased out
Stability-superheavy atomic battery
biosynthetic nanocarbon
engine
Reactor
Nuclear fission reactor
An atomic-electrical engine (a marketing phrase designed to quell fears over nuclear-powered cars which caught on somewhere in the early 21st century)