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The CR1220 battery is a compact, non-rechargeable 3V lithium coin cell, commonly used in small electronics like G-Shock watches, car remotes, calculators, medical devices, and fitness trackers.
The CR1220 lithium manganese dioxide battery is classified according to IEC (International Electrotechnical Commission) naming conventions. In this system:
"C" designates the chemical system, specifically lithium as the negative electrode and manganese dioxide (MnO₂) as the positive electrode.
"R" indicates the battery's round (cylindrical coin) shape. If the battery were rectangular, it would be labeled with an "F".
The digits "1220" provide the physical dimensions: the first two digits (12) represent a diameter of 12.5 mm, and the last two digits (20) represent a height of 2.0 mm.
The CR1220 has a nominal voltage of 3.0V and a typical end-point voltage of 2.0V. Its rated capacity is approximately 40 mAh, though actual capacity may vary slightly depending on the manufacturer and discharge conditions.
Thanks to its compact form factor, stable discharge curve, and long shelf life (up to 10 years), the CR1220 is widely used in low-drain electronic devices where reliability and size efficiency are critical.
Feature | Specification |
---|---|
Voltage | 3V |
Chemistry | Lithium (Li-MnO₂) |
Type | Coin / Button Cell |
Diameter × Height | 12.5 mm × 2.0 mm |
Capacity | ~35–40 mAh |
Max Continuous Current | ~0.1 mA |
Weight | Approx. 0.8 grams |
Operating Temp Range | -30°C to +60°C |
Shelf Life | Up to 10 years |
Rechargeable | No |
Mercury-Free | Yes |
Brand | Model Code | Notes |
---|---|---|
Panasonic | CR1220 | High quality, long-lasting |
Maxell | CR1220, LM1220 | Widely used, reliable capacity |
Energizer | ECR1220 | Popular in North America |
Duracell | DL1220 | Trusted consumer battery brand |
Sony | CR1220 | Common in remotes and wearables |
Renata | CR1220 | Swiss-made, used in watches |
The following models are equivalent to the CR1220 and can be used interchangeably:
All these batteries share the same dimensions (12.5×2.0 mm) and output (3V).
Toys and Electronic Games: Small battery-powered toys, light-up accessories, and handheld games frequently use CR1220 coin cells, taking advantage of their lightweight design and reliable energy output.
Calculators: Basic and scientific calculators that require a long-lasting power source often use CR1220 batteries for their low power consumption and extended shelf life.
Cameras and Backup Memory: Some compact digital cameras and film cameras use CR1220 batteries to power internal clocks, light meters, or memory backup circuits, particularly where space and weight are limited.
Feature | CR1216 | CR1220 | CR1255 |
---|---|---|---|
Voltage | 3V | 3V | 3V |
Diameter | 12.5 mm | 12.5 mm | 12.5 mm |
Thickness | 1.6 mm | 2.0 mm | 5.5 mm |
Capacity | ~25–30 mAh | ~35–40 mAh | ~80–100 mAh |
Max Current Output | ~0.08 mA | ~0.1 mA | ~0.3–0.5 mA |
Typical Drain Current | <0.05 mA (low-drain only) | 0.05–0.1 mA (standard use) | 0.1–0.5 mA (medium-to-high) |
Compatibility | May fit, but too thin | Standard size for slot | Too thick for CR1220 holders |
Use Case | Ultra-slim wearables, cards | Watches, remotes, gadgets | Sensors, IoT, long-life backup |
The Typical Drain Current row indicates the normal discharge current of a battery in a typical application, and can help match the user to real-world power scenarios (e.g., the CR1255 is more suitable for medium to high power sensor devices).
Murata Electronics
Jauch Quartz
Energizer Battery Company
Panasonic - BSG
Energizer Battery Company
Energizer Battery Company
FDK America, Inc., a member of Fujitsu Group
Panasonic - BSG
Murata Electronics
Energizer Battery Company
Energizer Battery Company
Panasonic - BSG