This high-quality Battery A2552 is specially crafted for the Apple S7 45mm watch. With a capacity of 309mAh and a voltage of 3.85V, it guarantees that your watch remains powered for an extended period, offering reliable performance. If you're looking for an Apple S7 watch battery, this 3.85V 309mAh battery is the ideal choice. It's specifically designed to meet your needs and keep your watch running smoothly. Get the A2552 battery and enjoy uninterrupted usage of your beloved Apple S7 watch.