This question seeks to predict a significant milestone in battery technology. Solid-state batteries represent the next major leap in battery innovation, offering higher energy density and safety compared to current lithium-ion batteries. The question focuses on whether any company will commercially release a solid-state battery with an energy density exceeding 400 Wh/kg before the end of 2024. This threshold of 400 Wh/kg is a notable improvement over current technologies and would mark a significant advancement in the field.

Verification Method:

1. Official Company Announcements: Monitor press releases, product launches, and official statements from leading battery manufacturers and tech companies involved in battery research and development.

2. Regulatory Filings: Check for any regulatory filings or certifications related to new battery technologies that meet the specified criteria.

3. Industry Reports and Journals: Review reports from credible market research firms and scientific journals that focus on battery technology and advancements.

4. News Coverage: Track major technology and business news outlets for announcements or reports of a company achieving this milestone.

The question will be considered verified when a solid-state battery meeting the specified energy density threshold is available for commercial purchase or order, as confirmed by at least one of the above methods.