Enovix AI-1 Smartphone Battery Achieves Highest Energy Density Ever Reported: Polaris Battery Labs

Enovix announced that Polaris Battery Labs has confirmed the Enovix AI-1 smartphone battery as the highest energy density cell ever reported for a smartphone. The AI-1 platform delivers step-function gains in energy density and charging speed for high-volume consumer applications. Independent testing results include an average volumetric energy density of ~919 Wh/L and fast charging at 3C rates. The confirmation strengthens Enovix's position as it delivers unprecedented energy density and charging performance with a truly differentiated solution.

Enovix Corporation (Nasdaq: ENVX) has received significant validation for its AI-1™ smartphone battery technology. Polaris Battery Labs, a global provider of independent battery performance testing, has confirmed that Enovix's AI-1™ battery has the highest energy density ever reported for a smartphone, with an average volumetric energy density of ~919 Wh/L. This marks a substantial improvement over current lithium-ion batteries used in smartphones, which typically range from 600 to 700 Wh/L, representing a 30-50% increase in energy density.

The AI-1™ platform, first unveiled in Q2 2025, combines advanced materials, micron-level design rules, and fully automated manufacturing to deliver step-function gains in energy density and charging speed. The independent testing also showcased impressive fast-charging capabilities, reaching 20% charge in just 3.8 minutes, 50% in 12.3 minutes, and 100% in 39.5 minutes at 3C rates. This performance is approximately three times faster than industry standards, which typically charge at 1C or lower rates.

The AI-1™ technology's success is particularly notable given that Enovix has already begun shipping to a third major smartphone original equipment manufacturer (OEM). This milestone suggests that the company has overcome manufacturing challenges that often hinder the commercialization of novel battery technologies. The AI-1™ platform's combination of advanced materials, micron-level design rules, and fully automated manufacturing addresses both performance and production barriers simultaneously.

The validation positions Enovix to potentially disrupt the smartphone battery market by enabling next-generation AI functionality that current batteries cannot adequately power. As smartphones increasingly rely on power-hungry on-device AI processing, battery density becomes a critical competitive factor for OEMs, creating a strong value proposition for Enovix's technology.

Enovix's AI-1™ platform is designed to capture share in the multi-billion-dollar smartphone battery market, offering higher energy density, faster charging, and robust cycle life. These advancements enable longer-lasting devices that unlock the next generation of AI-powered consumer experiences. The company's technology is supported by a robust portfolio of issued and pending patents covering its core battery design and manufacturing process.

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[1] https://www.stocktitan.net/news/ENVX/independent-testing-confirms-enovix-ai-1tm-battery-as-industry-s-h7nf984epjsb.html