A lifetime warranty is a guarantee provided by a manufacturer or seller that promises to repair or replace a product for the duration of the buyer's life. This warranty typically covers defects in materials or workmanship, ensuring that the product remains functional and free from major issues. However, it may not cover damage caused by misuse or normal wear and tear. It's important to read the specific terms of a lifetime warranty, as conditions can vary between different brands and products. Some warranties may require the original receipt or proof of purchase, while others might have limitations on what is considered a defect. Always check the details to understand your rights and responsibilities.