Why Are There Coin Batteries on Your Computer Motherboard? Here’s Why

Differences between Different Types of Coin Batteries Commonly Used in Motherboards

The most commonly used coin battery in motherboards is the CR2032 type. However, there are several other types that you may encounter, each with different technical specifications. Here are some common types of coin batteries used in motherboards and their differences:

1. CR2032

1. Voltage: 3V
2. Capacity: 220 mAh
3. Diameter: 20 mm
4. Depth: 3.2 mm
5. Usage: This is the most common type used in motherboards due to its adequate capacity and standardized size.

2. CR2025

1. Voltage: 3V
2. Capacity: 170 mAh
3. Diameter: 20 mm
4. Thickness: 2.5 mm
5. Usage: Similar to CR2032 but has a lower capacity and is slightly thinner. It can be used as a temporary substitute, but it is not recommended for the long term.

3. CR2016

1. Voltage: 3V
2. Capacity: 90 mAh
3. Diameter: 20 mm
4. Thickness: 1.6 mm
5. Usage: Much thinner and has a lower capacity than CR2032. Not recommended for use in motherboards due to its shorter durability.

Choosing the Right Coin Battery

A Guide to Choosing the Right Coin Battery for Your Motherboard

1. Check Motherboard Specifications
   • Before purchasing a replacement coin battery, be sure to check your motherboard’s manual or documentation. Look for information about the recommended coin battery type and size.
2. Make Sure the Voltage Is the Same
   • Generally, motherboards use coin batteries with a voltage of 3V, such as CR2032. Make sure the replacement battery has the same voltage to avoid damage to the motherboard.
3. Pay attention to the battery capacity
   • Battery capacity is measured in milliampere-hours (mAh). For motherboard purposes, choose a battery with adequate capacity. The CR2032 battery typically has a capacity of around 220 mAh, which is ideal for maintaining timing and BIOS.
4. Suitable Size
   • The diameter and thickness of the coin battery are very important. CR2032 has a diameter of 20 mm and a thickness of 3.2 mm. Make sure the replacement battery is the same size to fit in the motherboard slot.
5. Choose a Trusted Brand
   • The quality of coin batteries is essential for longevity and performance. Choose batteries from reputable brands that have a good reputation for quality products.
6. Check Production Date
   • Newer batteries have a longer lifespan. Be sure to check the manufacturing date on the battery pack to make sure you are getting a new and fresh battery.
7. Buy from Trusted Sources
   • To avoid counterfeit or low-quality products, buy batteries from trusted retailers, both physical and online stores that are reputable.