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Product Details

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    Discharge Rate
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    Long Cycle Life
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    Ultra-Low Self-Discharge
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    Wide Temperature Range

Lithium batteries exhibit varying discharge rates. Ufine's batteries support a maximum discharge rate of 5.0C,delivering high power output in short durations.
Ufine's lithium battery maintains over 80% capacity after 500 cycles at room temperature,utilizing 0.5C charge and discharge conditions.
Batteries exhibit differential self-discharge rates at 100% and 70% charge states.
Self-discharge is higher at 100% state of charge (SOC) compared to 70% SOC.
Lithium batteries operate within the -20°C to 60°C discharge temperature range.
Ufine's custom low-temperature batteries can be used for -40°C to 55°C operation, catering to diverse outdoor scenarios.

Heat-Resistant Materials

It is constructed using heat-resistant materials, safeguarding the battery against thermal degradation and maintaining stability even in elevated temperature settings.


Thermal Endurance Testing

Undergoes rigorous testing procedures simulating high-temperature conditions to ensure sustained functionality and performance under heat stress, validating reliability in extreme environments.


The battery is designed for use in various applications, including but not limited to outdoor electronics, smart home devices, emergency power banks, and mobile devices.


Hand Warmer Battery


Tire Pressure Monitor


Wearable Device

Battery Specification

  • 1. Mechanical Characteristics

    Cell 902030HT PCM Yes
    NTC No Weight appr. 9.15g
    Configuration 1S1P
  • 2. Electrical Specification

    Capacity 520mAh Nominal Voltage 3.7V
    Energy 1.924Wh Internal Resistance less than 160mΩ
    Max. Charge Voltage 4.2V Discharge Cut Off 2.75V
    Max. Charge Current 520mAh Max. Discharge Current 520mAh
    Standard Charge Current 260mA Standard Discharge Current 260mA
    Charging Temperature 0℃ to 45℃ Discharging Temperature -20℃ to 80℃
    Storage Temp.Range 1 year at -20℃ to +30℃ 3 mos. at -20℃ to +45℃ 1 mo. at -20℃ to +60℃ Cycle life 100 cycles ≥92% 300 cycles ≥88% 500 cycles ≥80%
  • 3. Cell protection

    Overcharge Detection 4.28V ±50mV (80 to 200msec delay, release 4.08V ±50mV) Overdischarge Detection 2.4V ±100mV (40 to 120msec. delay, release 3.0V ±100mV)
    Overcurrent Detection 2.5A to 4.5A (5 to 10msec. delay) Short protection Yes
Download Product Datasheet

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3.7 V 520mAh High Temperature Lithium Battery Application

High Temperature Lithium Battery Hand Warmer Battery

Specifically engineered for hand warmers, our lithium batteries exhibit impressive low-temperature resistance, ensuring consistent warmth in freezing environments. Their high energy density guarantees prolonged heating for hand warmers, providing reliable solutions for cold-weather accessories. Additionally, these batteries offer shape customization options, allowing tailored integration into diverse hand warmer designs.


High Temperature Lithium Battery For Tire Pressure Monitor

Engineered for tire pressure monitors, our lithium batteries offer both longevity and reliability with high energy density, ensuring consistent power for extended monitoring needs. Their durable build ensures reliability in varying environmental conditions, providing seamless performance for tire pressure monitoring systems. Moreover, these batteries' adaptable designs facilitate easy integration into different monitor models, offering reliable and uninterrupted power.


High Temperature Lithium Battery For Wearable Device

Our lithium batteries for wearable devices showcase high energy density, offering extended and consistent power for seamless device operation throughout the day. With exceptional low-profile designs and customizable shapes, these batteries seamlessly integrate into various wearable device configurations, providing reliable and unobtrusive power solutions for diverse applications. Their reliability in varied temperature conditions ensures uninterrupted performance, ideal for supporting the needs of wearable technology users in any environment.


The Complete Guide For 3.7 V 520mAh High Temperature Lithium ion Battery

A 3.7 V 520mAh high temp li-ion battery serves as a crucial power source for various electronic devices. This guide delves into its components, functionalities, and best practices for optimal use.

Part 1. Advantages and Applications

The 520mAh 3.7 V high temp li-ion battery offers a unique balance of capacity and voltage tailored for devices operating in high-temperature environments. Its advantages include sustained power delivery and resilience, ideal for applications like industrial sensors, wearable tech, automotive components, and emergency devices, ensuring consistent performance in elevated heat settings.

Part 2. Technical Specifications

Featuring a 520mAh capacity and a 3.7 V output, this specialized battery integrates high-temperature resilient materials and robust cell construction. Its technical specifications encompass heat endurance metrics, charging rates, and discharge profiles designed to maintain stable performance in high-temperature conditions.

Part 3. Safety and Handling

Equipped with safety mechanisms against overheating and thermal degradation, this battery ensures safe operation in elevated temperature environments. Proper handling guidelines, including temperature thresholds and storage recommendations, are imperative for safe utilization in high-heat scenarios.

Part 4. Maintenance and Longevity

Optimal maintenance practices are crucial for extending the battery's life. Adhering to recommended charging protocols, avoiding extreme temperature fluctuations, and periodic checks for physical damage ensure sustained longevity in high-temperature environments.

Part 5. Buying Guide and Recommendations

For reliable and customized solutions, consider sourcing your 520mAh 3.7 V high temp li-ion batteries from Ufine custom battery. Our commitment to quality assurance and tailored battery solutions ensures dependable performance for your specific needs.


  • What makes high temperature lithium batteries suitable for industrial use in elevated temperature environments?

    High temperature lithium batteries are designed with advanced materials and thermal management systems to ensure reliable performance in high-temperature settings.
  • Can high temperature lithium batteries withstand prolonged exposure to high temperatures without significant performance degradation?

    Yes, these batteries are engineered to endure extended high-temperature conditions while maintaining stable performance levels.
  • What safety measures are integrated into high temperature lithium batteries to mitigate risks associated with high temperatures?

    Advanced thermal controls and safety mechanisms are embedded within the batteries to regulate temperature and prevent overheating, ensuring safe operation.
  • How long does it take to fully charge a lithium battery?

    Charging time depends on the battery's capacity and the charger's current. For example, if the battery capacity is 4000mAh and the charger current is 2500mA, charging time = 4000mAh / 2500mA = 1.6 hours.
  • How long do lithium batteries last?

    Our lithium battery cycle life is more than 500 times. The lifespan of a lithium battery depends on various factors, such as usage patterns, charging and discharging conditions, and overall maintenance.
  • Can lithium batteries be customized for specific applications?

    Yes, lithium batteries can be customized to meet specific requirements. This includes customizing the battery capacity, voltage, size, shape, and other parameters to suit the application's needs. Capacity: 20mAh~12000mAh, Voltage: 3.2 V~48 V.


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High Energy Density

It stores large amounts of energy in a smaller and lighter package

Longer Cycle Life

Withstands extensive charge and discharge cycles

Low Self-Discharge

Maintains power longer when not in use


Minimizes the risk of accidents and ensures safe operation

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