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Power is not energy: why the difference matters

Technology Connections · explainer · Watch on YouTube

Power grid, heating & buildingsFundamental physics

What it is

Technology Connections explains the difference between power (watts) and energy (watt-hours) and why confusing them leads to errors. It runs about 52 minutes and uses everyday examples.

Why Hacker News recommends it

HN points to it whenever a thread mixes up power and energy, such as battery specs and solar generation.

  • 2 people recommended it
  • 2 different months
  • 0 strong recommendations
  • first 2025, last 2026

What HN commenters said

  1. “Shout out to "Technology Connections" YouTube channel for recently publishing "Power is not energy”

    Technology Connections video on power versus energy

    VogonPoetry, 2025-04 · Recommendation · in “Watts Should Replace MAh as Essential Spec for Mobile Devices”

  2. “Technology Connections made a pretty good 52 minute video about it the other month”

    52-minute explanation of the watts versus energy mistake

    DavidVoid, 2025-06 · Recommendation · in “Neuromorphic computing”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: watts, energy, electricity, units, physics

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