NewSun CR2032 3V Lithium Coin Battery – Compatible with RTC DS1307/DS3231 Modules

🔋 Introduction

If you’re working on an embedded system project, using a CR2032 battery for RTC module is essential to maintain accurate time even during power loss. The NewSun CR2032 3V Lithium Coin Cell is a perfect fit for real-time clock modules like DS1307, DS3231, and DS1338.

This battery ensures consistent 3V output and long-lasting performance, making it ideal for microcontroller-based systems like Arduino, ESP32, and Raspberry Pi projects.

For example, if you’re building a data logger using DS3231 RTC and ESP32, this coin cell keeps your RTC running smoothly without needing an external power supply 24/7.

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✅ Why Choose the NewSun CR2032 Battery for RTC Module?

• 🔹 Rated Voltage: 3V (stable output for RTC use)

• 🔹 Chemistry: Lithium (non-rechargeable and safe)

• 🔹 Model: CR2032 – standardized coin cell size

• 🔹 Brand: NewSun – Japan STD quality

• 🔹 Shelf Life: Up to 5 years under low current load

• 🔹 Compatibility: Fits into most RTC holders with + side facing up

Using a CR2032 battery for RTC module is crucial for time-sensitive applications, including real-time clock data logging projects and smart home automation.

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⚙️ Compatible RTC Modules

The NewSun CR2032 3V battery is suitable for:

• ✅ DS1307 RTC Module

• ✅ DS3231 RTC Module

• ✅ DS1338 and PCF85263A

• ✅ RV-3028-C7

• ✅ Other 3V-compatible RTC breakout boards

This battery is a drop-in replacement for any project or product that uses a CR2032 coin cell holder for RTC backup.

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⚠️ LIR2032 vs CR2032 – Know the Difference

Many beginners mistakenly use a LIR2032, which is rechargeable. However, most RTC modules (like DS3231 Mini) do not support charging and can be damaged by using a rechargeable battery. The CR2032 is non-rechargeable and safe for RTC applications.

Learn more about CR2032 battery safety standards on Wikipedia (DoFollow).

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🔗 Internal Power Connectivity

Simply insert the NewSun CR2032 battery into your RTC module with the positive side facing up. Most modules will immediately detect and use it to power the internal oscillator and memory chip.

Need help with installation? Check our RTC DS3231 + CR2032 setup tutorial.

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✅ Ideal Applications

This CR2032 battery for RTC module is widely used in:

• ⏱️ Arduino or ESP32 real-time clocks

• ⌚ Watches, timers, calculators

• 🖥️ CMOS backup in desktops and laptops

• 🧠 Embedded memory retention systems

• 📦 Low-power IoT and sensor devices

• 🔋 Battery-powered RTC-based systems

You can also pair it with our ESP32 Development Board and OLED Display Module for a complete low-power clock interface.

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📐 Technical Specifications

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🔒 Buy With Confidence

We ensure our NewSun CR2032 3V lithium coin cells are genuine and meet international safety standards. They come sealed in fresh retail packaging and are compatible with all 3V RTC modules.

Need a complete kit? Check out our RTC Starter Pack with Battery.

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🔗 External Resources (DoFollow)

• CR2032 Battery on Wikipedia

• DS3231 RTC Module Datasheet (Texas Instruments)

• Arduino RTC Library GitHub