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The concept of AI robots Taking over the world! 🌏
How Long Can a ROBOT🤖 Battery🪫 Last at Full Speed?
In plain terms: a real “Terminator-style” humanoid today would have poor endurance if you asked it to run flat-out and continuously fire a laser. Publicly visible humanoids are nowhere near that combination yet. As a benchmark, Boston Dynamics says its electric Atlas has about 4 hours of battery life in its industrial configuration, not as a sprinting combat robot. Separately, the U.S. Navy notes that a 10 kW laser needs about 34 kW of electrical input because of efficiency losses and cooling overhead. That means the laser alone would demand far more power than a humanoid robot normally budgets for hours-long operation.
So the realistic answer is‼️
Battery-only humanoid
If you imagine a humanoid robot running hard the whole time, carrying sensors, computing, actuators, cooling, and a 10 kW-class laser, the runtime would likely collapse from “hours” to minutes, not hours. A useful way to think about it is this: even a very large onboard battery for a humanoid would be eaten quickly by a laser load in the tens of kilowatts. On that basis, a battery-only system firing continuously would more likely last on the order of roughly 10–30 minutes, and if it were moving at a hard sustained pace of, say, 5–10 km/h, it might only cover about 1–5 km before going flat. That is an inference from the public Atlas endurance figure plus the Navy’s published laser power requirement, not a published fielded robot spec.
Hydrogen fuel-cell humanoid
Hydrogen fuel cells are real and already used in drones because they can extend endurance. Doosan says its hydrogen drone systems can deliver over 2 hours of flight, about 4–5× longer than battery drones, with examples around 40 km class range on those aircraft. But those are drone powerpacks in the kilowatt class; for example, Doosan’s DP30M2S is a 2.6 kW fuel-cell powerpack. That is excellent for endurance, but it is still far below the 34 kW input cited for even a 10 kW laser weapon. So a humanoid using hydrogen could plausibly get much better patrol endurance than a battery humanoid, but for continuous laser firing at full output, the fuel cell would still need a large hybrid buffer battery and the practical runtime would again likely be minutes to perhaps tens of minutes, not hours.
So if you want a clean bottom line:
Battery humanoid, flat-out + continuous laser: about 10–30 minutes, maybe 1–5 km.
Hydrogen-hybrid humanoid, flat-out + continuous laser: somewhat better, but still probably tens of minutes, not hours, unless the machine becomes much larger and heavier.
Patrol-only, without constant laser use: hydrogen can materially help endurance; continuous laser use is what kills the runtime.
So your instinct is basically right: today’s “Terminator” would be power-limited long before it became a cinematic unstoppable machine!
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