A science journalist is fact-checking a claim that a Tesla battery stores 0.3 kWh per kg. If a vehicle battery weighs 500 kg and 90% of stored energy is usable, what is the total usable energy in kilowatt-hours?

Wed, 06 May 2026 10:44:43 +0000

**A Science Journalist Is Fact-Checking a Claim: Tesla Battery Energy Density Under Scrutiny** In an age where electric vehicles are redefining transportation, questions about battery performance and efficiency are front-page topic—not just among engineers, but among everyday drivers curious about range, durability, and value. One widely circulated claim asks: Does a Tesla battery store 0.3 kWh per kilogram, and what does that mean for real-world performance? With next-generation EVs pushing energy density to new limits, clarifying these figures matters deeply—especially for buyers, analysts, and tech enthusiasts. This fact-check explores the data, context, and implications behind the numbers. --- **Why is this claim circulating now?**
Discussions about energy storage in EVs have sharply increased amid rising interest in sustainability, range, and battery longevity. Social media, tech newsletters, and Reddit forums frequently question whether Tesla’s battery claims align with scientific understanding. Public curiosity drives demand for accurate, transparent details—especially when figures like “0.3 kWh per kg” enter mainstream conversation without full context. A science journalist is now stepping in to clarify misinterpretations and separate credible data from oversimplifications.