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The Bunny v. the Copper Top: What A Battery Brand Battle Can Teach Us About Differentiating Law Firms

When you compete on claims no one can verify, you risk losing the only thing that matters: the belief that your brand is worth the premium.

4 minute read February 01, 2026 at 12:09 AM
By
Allen Adamson
The Bunny v. the Copper Top: What A Battery Brand Battle Can Teach Us About Differentiating Law Firms

The 10% That Sparked a Legal Charge



When Duracell filed suit against Energizer in June 2025, alleging that Energizer falsely claimed its “Energizer MAX lasts 10% longer than Duracell Power Boost,” the case seemed like just another round in the long-running rivalry between the Copper Top and the Energizer Bunny.

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