UltraLast - Lithium-Polymer Battery for Apple Watch 1 42mm

Lithium-polymer chemistry; 3.7V of power; up to 6-month shelf life

Stay in sync with your Apple smartwatch when you use this UltraLast smartwatch replacement battery. The unique design offers a perfect fit with select Apple watch models, providing dependable performance and reliable power. This UltraLast smartwatch replacement battery is rechargeable for added convenience and features a precise configuration for quick, easy installation.