The Renata CR1632 is a Swiss-made 3V lithium coin cell (Li/MnO₂) with 125–137 mAh capacity, measuring 16 × 3.2 mm and weighing ~1.8 g. Offering a 10-year shelf life with <1% annual self-discharge and an operating range of –40 °C to +85 °C, it delivers reliable, long-lasting power for small electronic devices.