10-Year Battery Life: It uses a high-capacity lithium battery and a low-power design to last roughly a decade of normal use. Important Note on "Warranty": The 10 years refers to the battery life estimate, not the repair warranty. The standard Casio repair warranty is usually 1 to 2 years. Extreme Durability: Like all G-Shocks, it is shock-resistant (survives big drops) and 200-meter water-resistant (safe for swimming and diving). Daily Features: Includes a bright backlight for night viewing, alarm, stopwatch, and timer. Warranty: 1-Year International Warranty