Lithium-polymer chemistry; 3.82V of power; up to 6-month shelf life

Ready your smartwatch for uninterrupted access to apps, text messages and fitness tracking information with this UltraLast smartwatch replacement battery. The simple configuration allows for effortless setup, and the rechargeable design extends the time between required replacements. This UltraLast smartwatch replacement battery works with select Apple smartwatches for reliable performance.