EXTENDED RUNTIME - Provides up to 4 hours of continuous use at 14°F (-10°C), ensuring your AFL anti-fog lens performs reliably in cold conditions for extended periods. RELIABLE POWER - Delivers a stable 3.6V output with a capacity of 1860mAh (6.7Wh), guaranteeing consistent and dependable performance for your Swarovski Optik devices. COMPACT DESIGN - Measuring just 2.1 x 0.9 x 0.8 inches and weighing only 1.4 oz, this battery offers a lightweight and space-saving power solution for your gear. SEAMLESS COMPATIBILITY - Specifically designed for use with Swarovski Optik AFL anti-fog lenses, ensuring a perfect fit and optimal performance without any compatibility issues.