• Chemistry: Lithium Manganese Dioxide (Li-MnO₂)
• Nominal Voltage: 3.0 V
• Nominal Capacity: ~35 mAh (Equivalent to ~0.115 Wh when discharged at 62 kΩ to 2.0 V at ~20 °C)
• Dimensions: Diameter: 12.3–12.5 mm; Height: 1.8–2.0 mm
• Weight: ~0.8 g
• Recommended Continuous Drain: ~0.05 mA
• Pulse Drain: Up to ~3 mA
• Operating Temperature Range: –20 °C to +60 °C
• Storage Conditions: 0–35 °C, 45%–75% relative humidity, no condensation

Performance & Durability:

• Leakage Resistance:
  • No leakage or deformation after continuous discharge to 1.2 V using 62 kΩ load
  • No leakage after 30 days at +60 °C (RH <70%)
• Markings on Battery: Includes model designation "CR1220", polarity "+", and type (Lithium Cell CR1220)

Key Features & Benefits

• Compact & Lightweight: At just ~12.5 mm × 2 mm and ~0.8 g, this coin cell is ideal for tiny, weight-sensitive devices like watches, key fobs, or sensors.
• Reliable Power Output: With a stable 3 V output and 35 mAh capacity, it supports consistent performance in low-power electronics.
• Low Self-Discharge & Long Shelf Life: While Tianqiu doesn’t explicitly state the shelf life, typical CR1220 cells maintain charge for years with ≤2% annual self-discharge.
• Safety Tested: Demonstrated resistance to leakage during over-discharge and high-temperature exposure suggests robust safety in storage and usage.
• Widely Compatible: CR1220 is interchangeable with equivalents such as SB-T13, ECR1220, DL1220, and BR1220—making it compatible with a wide range of devices.
• High Manufacturing Standards: Produced by a well-established Chinese high-tech battery maker with quality certifications (e.g. SGS, IEC, REACH, MSDS).