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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.

Battery Capacity Testing

Before shipment, each lithium battery undergoes meticulous testing to validate voltage, current, and other essential parameters, ensuring consistency and reliability in performance.


Environmentally Friendly

We use A-grade batteries, eco-friendly, safe and no droplet, energy-saving and environmentally friendly, economical and durable.


The battery is designed for use in various applications, including but not limited to beauty device medical device, Led lighting, 3C digital, pet toys, massage device.


Alarm Clock


Remote Control


Forehead Thermometer


Makeup Mirror


Glucose Meter

Battery Specification

  • 1. Mechanical Characteristics

    Cell 903759 PCM Yes
    NTC No Weight appr. 45g
    Configuration 1S1P
  • 2. Electrical Specification

    Capacity 2500mAh Nominal Voltage 3.7V
    Energy 9.25Wh Internal Resistance less than 130mΩ
    Max. Charge Voltage 4.2V Discharge Cut Off 2.4V
    Max. Charge Current 2500mA Max. Discharge Current 2500mA
    Standard Charge Current 500mA Standard Discharge Current 500mA
    Charging Temperature 0℃ to 45℃ Discharging Temperature -20℃ to 60℃
    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

Lipo Battery Cell Capacity Fast Calculator

Please enter your battery information to calculate the battery capacity and energy.

The capacity calculated by this tool is only an approximate value. If you need an accurate assessment, please contact our professional engineers.

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3.7 V 2500mAh Lithium Ion Battery Application

Lithium Polymer Battery For Alarm Clock

Start your day reliably with our lithium batteries designed for alarm clocks. Resistant to varying temperatures, these batteries ensure your alarm clock functions consistently,even during colder weather, guaranteeing you wake up on time. Their high energy density means fewer battery changes, offering peace of mind for uninterrupted mornings.


Lithium Polymer Battery For Remote Control

Our lithium batteries for remote controls provide extended longevity due to their high energy density, reducing the frequency of replacements. With low self-discharge rates, these batteries maintain power even during extended periods of remote inactivity.


Lithium Polymer Battery For Forehead Thermometer

Specifically crafted for forehead thermometers, our lithium batteries ensure accuracy and reliability with high energy density and exceptional low-temperature resistance. Consistent performance guarantees precise temperature readings for essential healthcare monitoring. Their adaptable designs seamlessly integrate into various thermometer models, ensuring uninterrupted functionality.


Lithium Polymer Battery For Makeup Mirror

Engineered for makeup mirrors, our lithium batteries ensure long-lasting power with their high energy density, perfect for daily beauty routines. Their stable and dependable performance supports uninterrupted use, ensuring flawless beauty regimens. Moreover, these batteries' versatile shapes effortlessly accommodate various mirror designs, providing reliable and enduring power for consistent usage.


Lithium Polymer Battery For Glucose Meter

Our lithium batteries for glucose meters excel in high energy density, ensuring prolonged and consistent power for accurate readings. Their exceptional low-temperature resistance guarantees reliable performance in various environmental conditions, crucial for uninterrupted usage in healthcare settings. With customizable shapes, these batteries seamlessly integrate into different glucose meter designs, providing reliable and customizable power solutions for diabetic patients.


The Complete Guide For 3.7 V 2500mAh Lithium Ion Battery

A 3.7 V 2500mAh lithium-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 3.7 V 2500mAh lithium-ion battery boasts lightweight construction and high energy density, making it ideal for portable devices like smartphones, GPS systems, and handheld gaming consoles. Its rechargeable nature contributes to cost-effectiveness and reduced environmental impact. This battery type finds extensive use in medical devices, ensuring consistent and reliable power for critical equipment.

Part 2. Technical Specifications

Understanding the technical specifications is essential. The 3.7 V rating indicates its nominal voltage, while the 2500mAh capacity determines its charge-holding capability. This battery's discharge rate influences how quickly it can deliver power to a device. Charging requirements vary, with compatibility across multiple charging systems, emphasizing the importance of using the right charger to avoid damage or reduced battery lifespan.

Part 3. Safety and Handling

Proper handling and safety precautions are paramount. Lithium-ion batteries are sensitive to temperature extremes and improper charging, which can lead to overheating or even explosion. Certified batteries with protective circuitry offer safeguards against overcharging, over-discharging, and short circuits. Storing batteries in a cool, dry place away from direct sunlight helps maintain their health and performance.

Part 4. Maintenance and Longevity

To extend battery life, adhere to recommended usage practices. Avoid complete discharges, which strain the battery, and opt for partial charges instead. Regularly update device firmware or software to ensure optimized battery performance. Keeping batteries at around 50% charge during long-term storage prevents degradation.

Part 5. Buying Guide and Recommendations

For reliable and customized solutions, consider sourcing your 2500mAh 3.7 V lithium-ion batteries from Ufine custom battery. Our commitment to quality assurance and tailored battery solutions ensures dependable performance for your specific needs.


  • Are lithium polymer batteries a fire hazard?

    Lithium polymer batteries have the potential to catch fire or swell if mishandled, damaged, overcharged, or exposed to extreme conditions. Proper care, handling, and charging significantly reduce the risk of hazards.
  • How do you keep a lithium polymer battery healthy?

    To maintain the health of a lithium polymer battery, avoid overcharging or deep discharging, store it at moderate temperatures, use compatible chargers designed for the battery, and periodically exercise the battery by charging and discharging it.
  • Are lithium polymer batteries safe for air travel?

    Airlines often have specific guidelines for carrying lithium batteries, such as limitations on the number of spare batteries or whether they should be carried in carry-on baggage rather than checked luggage. It's essential to adhere to airline regulations when traveling with lithium polymer batteries.
  • 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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