Panasonic CR 1220 battery

Key Specifications

• Nominal voltage: 3.0 V.

• Nominal capacity (typical): ≈ 35 mAh under light-load conditions.

• Dimensions: Diameter ≈ 12.5 mm, Height ≈ 2.0 mm.

• Weight: Approx. 0.9 g (around 1.2 g in some sources) depending on variant.

• Chemistry: Lithium-Manganese Dioxide (Li/MnO₂) — primary cell (non-rechargeable).

• Operating temperature range: Typically around –30 °C to +85 °C in standard version.

 Features

• Because of its very small and thin form factor (12.5 mm × 2.0 mm), the CR1220 is suitable for compact electronics where space is limited — e.g., small wearable devices, board backup batteries (RTC), tiny sensors.

• It offers stable 3 V output and very low self-discharge typical of lithium coin cells — which is important for long-term standby usage or memory backup.

• According to Panasonic data, it supports “high‐rate pulse discharge” and good low-temperature performance thanks to the manganese-dioxide positive electrode.