Tesla 4680 Battery Falls Short On Range And Charging After Years Of Hype

Tesla's 4680 battery promised exponentially greater power, density, and range. However, five years after Battery Day - when the 4680 was revealed - the numbers leave much to be desired. Tesla's vertical integration nightmare has come true, where it has managed to cut costs, but its batteries fall short when compared with competitors across the industry, even cheaper LFP batteries.

Behind On Paper, And In Real Life

Tesla's 4680 battery was designed to replace the industry-standard Panasonic 2170. Tesla promised 5x the energy of existing industry batteries. But the energy density of its 4680 batteries stands at 244 wh/kg, compared with the Panasonic 2170 at 269 wh/kg. Tesla promised 6x more power; however, with 79 kWh, its output is less than the 82 to 84 kWh produced by the LG batteries that it is replacing. Range is approximately 8 percent less than its LG predecessor as well.

Those numbers are simply "on-paper" numbers; the real-world effect can be felt at charging stations. At the Supercharger, the 4680 is falling behind. Recent tests show that after just 15 minutes, 4680-equipped vehicles added roughly 27 kWh of energy, while cars using cheaper LFP (Lithium Iron Phosphate) batteries added 29 kWh. The flagship cell is being outpaced by "budget" chemistry.

Background and Consumer Impact

Tesla is now fitting the 4680 batteries to its European-market Model Y, and consumers are feeling the difference. From YouTube videos to forum rants, consumers are further antagonized by the fact that Tesla has yet to announce which specific models are sold with the 4680 battery pack.

The Cybertruck was meant to be the original platform for the 4680. After significantly overestimating Cybertruck demand, currently selling well under its 250,000-a-year production capacity, Tesla now finds itself renegotiating with suppliers and finding more uses for its shiny new paperweights.

Being built at Giga Austin, these new batteries are being employed in the Tesla Semi as well, and with production and deliveries set to pick up soon, we hope for Tesla's sake that these performance issues don't make it to its logistics industry offering.

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This story was originally published May 8, 2026 at 5:15 PM.