CR1220-dat

The CR1220 is a lithium coin cell battery with the following key features:

Specifications:

  • Diameter: 12 mm
  • Thickness: 2.0 mm
  • Nominal Voltage: 3V
  • Capacity: Approximately 35-40 mAh (varies by brand)
  • Chemistry: Lithium Manganese Dioxide (LiMnO2)
  • Operating Temperature Range: -30°C to +60°C

Common Applications:

  • Watches
  • Calculators
  • Car key fobs
  • Small medical devices (like glucose meters)
  • Motherboards (for CMOS memory)
  • Small toys

Advantages:

  • Long Shelf Life: Typically 5-10 years due to low self-discharge rates.
  • High Energy Density: Ideal for compact devices.
  • Stable Voltage Output: Ensures consistent device operation.

Pulse Current

The CR1220 lithium coin cell battery is designed for low-power devices, and its discharge current specifications depend on the manufacturer and application. Here's an overview:

  1. Continuous Discharge Current
    • Typical Range: 0.1 mA to 0.2 mA
    • This current is sufficient for steady operation in devices like watches, calculators, and small sensors.
  2. Maximum Pulse Discharge Current
    • Typical Range: 1 mA to 5 mA (varies by brand)
    • The battery can briefly supply higher currents for short bursts, such as transmitting signals in key fobs or powering small LEDs.

Important Notes:

Overloading the Battery:

If the discharge current exceeds the specified range for a long time, it may cause:

  • Sudden voltage drop
  • Reduced capacity
  • Battery heating or leakage

Brand Variation:

Manufacturers like Panasonic, Sony, or Maxell may have slightly different specifications for their CR1220 batteries. Always check the datasheet for the specific brand you're using.

Recommendations:

If your device requires higher discharge currents (e.g., above 10 mA), consider:

Adding a Capacitor: To handle short bursts of high current. Using a Larger Battery: Such as CR2032 or CR2450, which are better suited for higher-power applications.

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