🔋 CR1220 Battery – Description
The CR1220 is a small, round lithium coin cell battery commonly used in compact electronic devices that require low but stable power over a long period. It is known for its long shelf life, lightweight design, and reliable voltage output.
Typical applications include:
Watches and calculators
Car key fobs and remote controls
Motherboards (CMOS backup)
Fitness devices and small medical instruments
⚙️ CR1220 Battery – Specifications
Battery Type: Lithium coin cell
IEC Name: CR1220
Nominal Voltage: 3 volts
Typical Capacity: ~35–40 mAh
Diameter: 12.5 mm
Thickness: 2.0 mm
Chemistry: Lithium manganese dioxide (Li-MnO₂)
Weight: ~0.8 grams
Operating Temperature: -20°C to +60°C
Shelf Life: Up to 5–10 years
Rechargeable: No (primary battery)
🧠 Naming Breakdown
CR = Lithium manganese dioxide chemistry
12 = 12 mm diameter
20 = 2.0 mm thickness
✅ Key Features
Stable 3V output throughout most of its life
Low self-discharge rate
Compact and lightweight
Leak-resistant design (in quality brands)
⚠️ Important Notes
Not rechargeable—attempting to recharge can be dangerous
Keep away from children (coin cells are a swallowing hazard)
Dispose of properly according to local regulations