The CR2032 lithium coin cell is a high-capacity 3V battery designed for low-drain and standby-critical electronic devices. With a nominal capacity of 230 mAh, it delivers long-lasting and stable power under continuous discharge conditions, making it ideal for applications that require extended service life and minimal maintenance.
This battery is engineered with a lithium negative electrode and a manganese dioxide positive electrode, combined with an organic electrolyte and sealed in a stainless steel casing for enhanced safety and durability. It maintains a low annual self-discharge rate of ≤3%, ensuring reliable performance even after long-term storage. Operating reliably over a temperature range of -20°C to +60°C, the CR2032 is well-suited for both indoor electronics and outdoor devices operating in varying environments.
Key Features
High Nominal Capacity: Delivers up to 230 mAh under continuous discharge to 2.0V with a 15 kΩ load at 23±3°C, supporting long operating life.
Stable 3V Output: A nominal 3V ensures consistent, predictable power delivery for low-power electronic circuits.
Low Self-Discharge Rate: An annual self-discharge rate of ≤3% helps maintain stored energy during long shelf life and standby periods.
Controlled Discharge Capability: Supports a maximum continuous discharge current of 3 mA and a maximum pulse current of 20 mA for stable operation.
Wide Operating Temperature Range: Operates reliably from -20°C to +60°C, suitable for diverse application environments.
Compact Coin Cell Design: Maximum dimensions of 20.0 mm diameter and 3.2 mm height enable easy integration into space-limited designs.
Robust Internal Structure: Features a lithium negative electrode, manganese dioxide positive electrode, organic electrolyte, separator, and stainless iron casing for safety and durability.
Lightweight Construction: Weighs approximately 3.2 g per cell, making it ideal for compact, portable devices.
Application Areas
CR2032 batteries are widely used in low-power electronic products requiring long service life and stable voltage output, including:
CMOS and RTC backup power
Remote controls and key fobs
Medical and healthcare devices
Wearable electronics
Smart sensors and IoT devices
Electronic meters and monitoring equipment
Memory backup for industrial and consumer electronics
Testing methods
| Serial No. | Item | Standard | Test Method |
| 1 | External Dimensions | Diameter 20.0mm, Height 3.2mm | Measure with a vernier caliper of accuracy not less than 0.02mm or a measuring tool of equivalent accuracy. |
| 2 | Appearance | The battery surface shall be smooth, free of scratches/deformation, with clear markings and no leakage. | Visual inspection. |
| 3 | Open-Circuit Voltage | 3.0～3.5V | Place the battery at 23±3℃ and 45%~75% humidity for at least 24h, then measure with a DC voltmeter under the same conditions. |
| 4 | Discharge Capacity | 230mAh | Place the test sample battery at 23℃±3℃ and 45%~75% humidity for at least 24h, then discharge continuously to 2.0V termination with a 15kΩ load resistor in series, in the same environment. |
| 5 | Terminals | Good electrical conductivity, no leakage or rusting. | Visual inspection. |
| 6 | Temperature Characteristics | Low-temperature discharge: 60% of rated capacity | Discharge continuously to 2.0V termination with a 15kΩ load resistor in series at -20℃±2℃. |
| High-temperature discharge: 99% of rated capacity | Discharge continuously to 2.0V termination with a 15kΩ load resistor in series at 60℃±2℃. |
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