• home
• about
• new
• essays
• AI
• book

Frank Visser, graduated as a psychologist of culture and religion, founded IntegralWorld in 1997. He worked as production manager for various publishing houses and as service manager for various internet companies and lives in Amsterdam. Books: Ken Wilber: Thought as Passion (SUNY, 2003), and The Corona Conspiracy: Combatting Disinformation about the Coronavirus (Kindle, 2020).

The Universe as a Discharging Battery

Origin, Entropy, and Final States

Frank Visser / ChatGPT

The metaphor of the universe as a battery is rhetorically powerful, but it risks smuggling in assumptions that physics does not actually endorse. A battery is a device that stores usable energy in a gradient and then dissipates it as work is performed. The universe, by contrast, is not embedded in a larger system from which it “draws charge,” nor is there any external circuit into which it discharges. Still, the analogy captures something real: the cosmos began in an extremely low-entropy state and has been “running down” ever since under the governance of the Second Law of Thermodynamics.[1]

What follows is an attempt to sharpen that intuition without distorting the physics.

1. What Does It Mean That the Universe “Started Charged”?

In thermodynamic terms, the early universe—shortly after the Big Bang—was not “energetically full” in the sense of a charged battery, but structurally ordered. This is a crucial distinction. The primordial plasma was hot and nearly uniform, which might seem like maximum disorder. Yet gravity changes the bookkeeping: a smooth distribution of matter actually represents low gravitational entropy. Clumping—forming stars, galaxies, black holes—increases entropy.

So the real puzzle is not where the “energy” came from, but why the initial conditions were so special. Why did the universe begin in a state of extraordinarily low entropy, given that vastly more high-entropy configurations are possible? Several approaches exist:

Inflationary cosmology suggests that a brief exponential expansion (driven by a scalar field) smoothed and flattened spacetime, effectively resetting the entropy conditions. This invokes the Cosmic Inflation as a dynamical explanation.

Quantum cosmology sometimes treats the universe as emerging from a quantum vacuum fluctuation. In such models, total energy may be close to zero, balancing positive matter energy against negative gravitational energy. The “charge” is then not injected but arises from boundary conditions.

More speculative ideas, such as those associated with Roger Penrose, argue that the low entropy of the early universe is tied to special constraints on spacetime curvature, encoded in what he calls the Weyl curvature hypothesis.

None of these explanations is universally accepted. The honest answer is that the “initial charge” problem remains open: it is a boundary condition question rather than a dynamical one.

2. Entropy as the True Currency of Cosmic Evolution

If the universe is a battery, entropy is the measure of how much usable energy remains. As stars burn hydrogen into helium, as galaxies collide, as black holes accrete matter, energy becomes increasingly unavailable for doing work. This is not because energy disappears—it is conserved—but because it spreads out.

The concept at work here is not energy depletion but free energy depletion. The universe began with enormous gradients—temperature differences, density contrasts—that could drive processes. Over time, these gradients flatten.

Black holes play a paradoxical role. They are often seen as endpoints, but thermodynamically they are extreme entropy generators. The entropy of a black hole, as described by the Bekenstein-Hawking entropy formula, is proportional to the area of its event horizon. When matter falls in, entropy increases dramatically.

3. How Does the Universe End? Competing Scenarios

The fate of the universe depends on large-scale dynamics governed by general relativity and the properties of dark energy. Several scenarios are considered plausible:

Heat Death (Thermal Equilibrium)

This is the most widely accepted outcome. Expansion continues indefinitely, stars exhaust their fuel, black holes evaporate via Hawking Radiation, and the universe approaches a state of maximum entropy. No gradients remain, no work can be extracted. The “battery” is fully discharged—but not empty, just unusable.

Big Freeze

Often treated as synonymous with heat death, emphasizing the temperature aspect: the universe asymptotically approaches absolute zero as expansion dilutes energy density.

Big Crunch

If gravitational attraction were to overcome expansion (which current data suggests is unlikely), the universe could recollapse into a high-density state. This would not simply “recharge” the battery; entropy would still increase, raising deep questions about cyclic models.

Big Rip

If dark energy grows stronger over time, as in some phantom energy models, expansion accelerates to the point where galaxies, stars, planets, and eventually atoms are torn apart. This scenario hinges on the nature of dark energy, often associated with the cosmological constant Λ.

4. Does the Battery Analogy Ultimately Hold?

Only partially. A battery implies externality: it is charged, discharged, and possibly recharged within a larger framework. The universe, as far as current physics can tell, has no such external environment. It is a closed system in which the laws of thermodynamics apply globally.

A more precise metaphor might be that the universe is not a battery but a relaxation process: a system evolving from an extraordinarily improbable low-entropy configuration toward vastly more probable high-entropy states.

That leaves us with a profound asymmetry: the future is statistically predictable (more entropy), but the past is not (low entropy is highly special). Explaining that asymmetry—why the universe began “wound up” at all—remains one of the deepest unresolved problems in fundamental physics.

Conclusion

The intuition that the universe is “running down” is correct, but the idea that it must therefore have been “charged” in the familiar sense is misleading. The real mystery is not the source of energy, but the origin of order. Physics can describe the discharge in exquisite detail; it is far less clear on why the initial conditions allowed such a discharge to occur at all.

Appendix: Is there such a thing as negentropy?

Negentropy: What It Is (and Isn't)

The term “negentropy” (negative entropy) was popularized by Erwin Schrödinger in his 1944 book What Is Life?. He used it to describe how living systems maintain order: organisms appear to “feed” on negative entropy by importing structured energy (like sunlight or chemical nutrients) and exporting disorder to their surroundings.

In strict thermodynamics, however, entropy is always non-negative and defined relative to a system's microstates. There is no standalone physical quantity called “negentropy” in the equations. What people usually mean by negentropy is either:

• Low entropy relative to a maximum, or

• Free energy available to do work, or

• Local decreases in entropy within an open system

So negentropy is best understood as order, structure, or usable energy, rather than a literal negative value.

Local Order vs. Global Disorder

The key to resolving the apparent paradox is the Second Law of Thermodynamics. It states that the total entropy of a closed system increases over time. But subsystems can become more ordered—provided they export enough entropy elsewhere.

This is exactly what happens:

• A star like the Sun creates a flow of low-entropy radiation.

• The Earth receives that energy and uses it to build complex structures (weather systems, ecosystems, life).

• In the process, it radiates higher-entropy heat back into space.

So life and complexity are not violations of entropy—they are byproducts of entropy increase. They exist because gradients exist.

Negentropy and Information

There is a deep connection between entropy and information, formalized in Information Theory by Claude Shannon. In that framework:

• High entropy = high uncertainty (randomness)

• Low entropy = high information (structure)

Negentropy is sometimes used informally to mean “information content.” This is especially common in discussions of biology, cognition, and complex systems. But again, this is interpretive language layered on top of formal definitions.

Does the Universe Contain Negentropy?

In your earlier “battery” metaphor, negentropy corresponds to the initial gradients—the differences in temperature, density, and gravitational potential that allowed structure to form.

The early universe had:

• Extremely low gravitational entropy

• Enormous potential for structure formation

That “potential” is what one might loosely call negentropy. As the universe evolves, that potential is steadily consumed:

• Stars burn fuel

• Galaxies form and merge

• Black holes maximize entropy

In the long run, as we discussed, the universe trends toward equilibrium—maximum entropy—where no negentropy remains in any meaningful sense.

A Subtle but Important Correction

It is tempting to think of negentropy as a kind of substance that gets used up, like charge in a battery. That picture is misleading. What actually disappears are gradients and correlations—differences that can be exploited to do work.

Once everything is uniform, there is still energy everywhere—but no structure, no contrast, no leverage.

Conclusion

Negentropy is a useful conceptual lens, especially in biology and information theory, but it is not a fundamental physical entity on par with energy or entropy. It names the same asymmetry your original question pointed to: the universe began in a state rich in structure and possibility, and it is gradually exhausting that potential.

In that sense, if entropy is the measure of what has already been “spent,” negentropy is a way of talking about what remains available to be spent—but only locally, temporarily, and always at the cost of increasing the total entropy of the whole.

Read more

[1] Ethan Siegel, "Did the Universe have zero entropy when it first began?", bigthink.com, February 22, 2024