CR-1220 3V Lithium Batteries Button Cell Power your small electronics with dependable, long-lasting energy using the CR-1220 3V Lithium Button Cell Battery. This compact coin cell battery is designed for use in devices where space is at a premium but reliable voltage is critical—like watches, key fobs, medical sensors, computer memory backup (RTC), and small electronics. Though small, it delivers a stable 3 volts and excellent shelf life, making it a go-to choice for precision power needs. Features Nominal 3V Output – Provides a stable voltage for applications that demand reliability. Compact Design – Measures just ~12.5 mm in diameter and ~2.0 mm in thickness, making it ideal for tight spaces. Long Shelf Life – Low self-discharge rate enables storage over years without significant capacity loss. High Energy Density – Despite its small size, it packs sufficient capacity for many low-drain devices. Non-Rechargeable / Primary Cell – Designed for one-time use in lithium chemistry (Li / MnO₂). Specifications Chemistry: Lithium / Manganese Dioxide (Li / MnO₂) Nominal Voltage: 3.0 Volts Typical Capacity: ~35–40 mAh Diameter: ~12.5 mm (0.49 in) Thickness: ~2.0 mm (0.079 in) Weight: ~0.8 grams Operating Temperature: –20 °C to +60 °C Self-Discharge: ~1% per year What’s in the Box 1 × CR-1220 3V Lithium Button Cell Battery The CR-1220 3V Lithium Button Cell is a compact, reliable power solution for small devices that need stable voltage over time. With its nominal 3V output, low self-discharge, and durable construction, it’s well suited for electronics like watches, backup memory in computers, key fobs, calculators, sensors, and more. Though non-rechargeable, it offers strong performance in a coin cell form factor. Always ensure correct polarity when installing, and dispose of used lithium cells at proper battery recycling points to protect the environment.