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CR2025 Lithium Coin Battery
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Feature and Technical Specifications
- Lithium Coin Cell
- Nominal Voltage: 3.0 Volts
- Maximum Current: 0.14A
- Non - Rechargeable Disposal battery
- Typical Capacity: 163 mAh @ 20°C 15kΩ Load
- Service Life: ~680 Hrs @20°C 15kΩ Load
- Typical Weight: 2.6 grams (0.08 oz.)
- Operating Temp: -30C to 60C
- Self-Discharge: ~1% / year
Equivalent for CR2025 Battery
Other Coin Cell Batteries
CR2032, CR2016, CR1220
Brief about CR2025 Battery
Coin cell batteries like CR2025 are generally used for small portable electronics devices such as wrist watches, pocket calculators, automobile key less entry transmitter and hearing aids. Typically they are of compact size, 5-25mm in diameter and 1-6mm in height. The name defines the size of the battery like for CR2025, the first two digits stands for diameter and second for height or thickness in tenths of mm. So, according to this 20mm is the diameter of CR2025 and 2.5mm is the thickness.
Lithium button or coin cell batteries are a bit costly than alkaline, but last longer, weigh less and have a wide operating temperature range.
How to calculate the run time of your CR2025 battery
The CR2025 is a commonly used battery for portable electronics applications. The life time of the battery depends on the many parameters like operating temperature, discharge current, dynamic loads etc. But for the sake of simplicity let us assume that we power a normal load which consumes a constant current of 20mA at 20°C. Then in that case the mAh capacity of our battery is 163mAh. This means that if we draw 163mA, then our battery will last for 1 hour and similarly if we draw 81.5mA then the battery will last for 2 hours. So for our application which consumes only 20mA the battery should last for (163/20) 8.15 hours. However this figure will not be accurate due to the varying current and operating temperature of the system. The CR2025 datasheet also provides a neat graph to understand the same
Internal Resistance Characteristics
Another important parameter to consider while deciding your battery is the internal resistance of the battery. Sadly every battery will have some internal resistance associated with it which will prevent you from drawing maximum current from the battery. The lower the IR (Internal Resistance) the more current you will be able to draw from it and higher the efficiency of the battery will be, the IR of a battery will increase as it ages or due to its operating environment.
When, performing Pulse Test at 25℃, continuous background drain at 15k ohms is 0.193mA @ 2.9V. And, pulse drain in every 2 seconds *12 times/delay at 400 ohms is 6.8mA @ 2.7V.
How to Use CR2025 Coin Cell?
As per the below circuit diagram, you can power up a 3V DC motor by using CR2025 battery. These batteries are used in many modules also like RTC module. The output voltage is 3V so you can also power up your devices, module, electronic equipments which operates on 3V.
- PCMCIA static RAM memory cards
- Small PDA devices
- Various electronic toys
- Laser pointers
- Digital thermometers
- Digital altimeter
- Heart rate monitors
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