Li-Polymer Battery 500mAh: Complete Technical & Application Guide

A 500mAh lithium polymer (Li-polymer) battery is a compact, lightweight rechargeable power solution widely used in medical devices, wearable electronics, IoT modules, and consumer electronics. Its balance between size, energy density, and design flexibility makes it one of the most demanded battery capacities in modern electronics.

This guide provides a professional, data-driven, and application-oriented overview of 500mAh Li-polymer batteries—covering specifications, performance metrics, safety standards, customization options, and real-world use cases.

What Is a 500mAh Li-Polymer Battery?

A Li-polymer battery (LiPo) is a type of lithium-ion battery that uses a polymer electrolyte instead of a liquid electrolyte. The “500mAh” rating refers to its nominal capacity, meaning the battery can theoretically deliver 500 milliamps for one hour under standard conditions.

Key Characteristics

• Nominal voltage: 3.7V

• Fully charged voltage: 4.2V

• Lightweight and thin profile

• Flexible shape and size options

• High energy density for compact devices

Compared to cylindrical lithium-ion cells, Li-polymer batteries excel in custom form factors and space-constrained applications.

Typical Specifications of a 500mAh Li-Polymer Battery

Below is a reference specification table. Actual values may vary depending on cell chemistry and customization.

Table: Standard Technical Specifications

Common Dimensions of 500mAh Li-Polymer Batteries

Li-polymer batteries are identified by thickness × width × length (mm).

Common Models

Customization advantage: Unlike cylindrical cells, Li-polymer batteries can be engineered to fit irregular or ultra-thin device enclosures.

Applications of 500mAh Li-Polymer Batteries

Medical Devices

500mAh Li-polymer batteries are commonly used in:

• Portable diagnostic equipment

• Wearable medical monitors

• Hearing assistance devices

• Drug delivery pumps

Medical applications prioritize stable discharge, safety compliance, and long cycle life.

Wearable Electronics

Examples include:

• Smartwatches

• Fitness trackers

• Smart bands

• Body-worn sensors

The lightweight and thin structure makes Li-polymer batteries ideal for long-term wear comfort.

IoT & Smart Devices

• GPS trackers

• Smart locks

• Wireless sensors

• Asset tracking modules

Low self-discharge and consistent voltage output are key advantages.

Performance & Runtime Estimation

Battery runtime depends on device power consumption.

Example Calculation

If a device consumes 100mA continuously:

Runtime ≈ 500mAh ÷ 100mA = 5 hours

For intermittent usage or sleep-mode devices, runtime can extend to days or weeks.

Safety Features in 500mAh Li-Polymer Batteries

High-quality Li-polymer batteries integrate multiple safety layers:

• Overcharge protection

• Over-discharge protection

• Over-current protection

• Short-circuit protection

• NTC temperature monitoring

For B2B and regulated markets, batteries are typically supplied with PCM/BMS protection circuits.

Certifications Required for 500mAh Li-Polymer Batteries

Key International Certifications

• UN38.3 – Mandatory for air and sea transport

• IEC 62133 – Safety for portable devices

• UL 1642 / UL 2054 – North American markets

• CE / RoHS / REACH – EU compliance

Certified batteries significantly reduce import risks and compliance delays.

Customization Options for 500mAh Li-Polymer Batteries

At A&S Power, 500mAh Li-polymer batteries can be customized based on OEM requirements:

Customizable Parameters

• Dimensions & thickness

• Connector type (JST, Molex, Hirose, custom)

• Wire length & gauge

• PCM/BMS configuration

• Operating temperature range

• Branding & labeling

This flexibility is critical for medical, industrial, and premium consumer electronics.

Li-Polymer vs Li-Ion at 500mAh Capacity

Battery Lifespan & Storage Recommendations

Expected Lifespan

• 300–500 full charge cycles

• Partial charging extends lifespan

Storage Guidelines

• Store at 40–60% SOC

• Temperature: 15–25°C

• Avoid deep discharge during long storage

Quality Control & Manufacturing Standards

A professional Li-polymer battery manufacturer follows:

• Cell grading & matching

• Aging tests

• Capacity verification

• Internal resistance testing

• Final safety inspection

This ensures consistent performance across production batches.

Frequently Asked Questions (FAQ)

Is a 500mAh Li-polymer battery safe?

Yes. When equipped with a proper PCM/BMS and compliant with IEC 62133 and UN38.3 standards, 500mAh Li-polymer batteries are safe for consumer and medical applications.

How long does a 500mAh Li-polymer battery last?

Depending on usage, it typically lasts 300–500 charge cycles or 2–3 years in normal operation.

Can I customize the size of a 500mAh Li-polymer battery?

Yes. One of the biggest advantages of Li-polymer batteries is customizable dimensions, making them ideal for compact or irregular device designs.

Is a 500mAh battery suitable for medical devices?

Absolutely. With proper certification and quality control, 500mAh Li-polymer batteries are widely used in wearable and portable medical equipment.

What is the minimum order quantity (MOQ)?

MOQ depends on customization level. Standard models usually have lower MOQs, while fully customized designs may require engineering sampling.

Conclusion

A 500mAh Li-polymer battery offers an optimal balance of capacity, size, safety, and customization, making it a preferred power solution for modern compact electronics. When sourced from a certified and experienced manufacturer like A&S Power, it ensures reliability, compliance, and long-term performance.

For OEM or custom battery projects, working directly with a specialized lithium battery manufacturer significantly reduces development risk and time-to-market.