ML1220/ML2032 Performance and Applications

### **ML1220 Rechargeable Coin Cell Battery Performance and Application Scenarios**

ML1220 is a common rechargeable coin cell battery, typically in a lithium-ion or lithium-polymer chemistry. The following are its detailed performance characteristics and main application scenarios:

---

### **I. Performance Characteristics**

#### 1. **Electrochemical Properties**
- **Voltage Rating**: Typically 3.0V or 3.7V (depending on chemistry).
- **Capacity**: Capacities typically range from 15mAh to 25mAh, with specific capacities varying depending on manufacturer and design.
- **Charge/Discharge Cycle Life**: It can support 300-500 charge/discharge cycles, depending on the usage conditions and charging method.

#### 2. **Temperature Performance**
- **Operating Temperature Range**: Typically -20°C to +60°C. Some high-performance models can operate at lower temperatures, but capacity and discharge performance may be reduced.
- **Low Temperature Performance**: In low temperature environments (e.g., -20°C), the ML1220 still provides stable discharge performance, but the capacity may be reduced.

#### 3. **Physical Characteristics**
- **Size**: Approximately 12.5mm in diameter and 2.0mm in thickness, which meets the standard size of a coin cell battery.
- **Weight**: Usually lightweight, suitable for portable devices.

#### 4. **Charging Characteristics**
- **Charging Voltage**: Typically 3.0V or 4.2V (depending on chemistry).
- **Charging Current**: It is recommended to use a low current charge (e.g. 0.1C, i.e. 1.5mA-2.5mA) to prolong battery life.
- **Charging time**: The charging time depends on the charging current and battery capacity, usually 2-4 hours.

#### 5. **Merit**
- **Rechargeable**: Support multiple charge and discharge, economical and environmentally friendly.
- Small size and light weight: Ideal for space-constrained equipment.
- **Low self-discharge rate**: Less loss of power during storage.

#### 6. **Precautions**
- **Overcharge & Over-Discharge Protection**: It is recommended to use a charger with a protective circuit to avoid overcharging or over-discharging and prolong battery life.
- **Temperature Management**: Avoid charging in extremely high or low temperatures to avoid affecting performance and longevity.
- **Compatibility**: Make sure the battery size and voltage match the device requirements.

---

### **II. Application Scenarios**

ML1220 rechargeable coin cell battery is widely used in the following fields due to its small size, stable performance and rechargeable characteristics:

#### 1. **Small Electronic Devices**
- **Smart Watch**: Provide a stable power supply for the smart watch and support long-term use.
-

- **Bluetooth headset**: Used for power supply of Bluetooth low energy headset to ensure long battery life. - **Calculator**: Provides reliable power support in a portable calculator. - **Electronic Key**: Used to power a car key remote or smart door lock. #### 2. Back-up Power - Real-Time Clock (RTC): Provides backup power to the RTC module to ensure that the device can keep time records even if the power is off. - Static Random Access Access (SRAM): A backup power supply for SRAM to prevent data loss. #### 3. **Medical Equipment** - **Portable Medical Monitoring Devices**: Such as blood glucose meters, heart rate monitors, etc., to ensure that the device works properly outdoors or in an emergency. - **Implantable Medical Devices**: Some low-power implantable devices, such as pacemakers, may use the ML1220 as a backup power source. #### 4. Internet of Things (IoT) Devices: Low Power Sensors: Used for environmental monitoring, agricultural sensors, etc., to support long-term data acquisition and transmission. - **Wireless Communication Module**: Provides power to low-power wireless communication devices (e.g., ZigBee, LoRa modules). #### 5. **Industrial Equipment** - **Instrumentation**: Used to power portable test instruments or industrial control equipment. - Data Logger: Provides stable power to the data logger in low temperatures or harsh environments. #### 6. **Consumer Electronics** - **Electronic Toys**: Provides power for small electronic toys to support long-term use. - **LED Devices**: Used to power small LED lights or decorative lights. --- ### **III. Summary** With its small size, stable performance and rechargeable characteristics, the ML1220 rechargeable coin cell battery has become an ideal choice for many small electronic devices and low-power applications. Whether it's consumer electronics, medical devices, or IoT devices, the ML1220 delivers reliable power support while being economical and environmentally friendly.