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CR1632 Lithium Battery (Coin Cell)
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CR1632 is the lithium coin cell battery that is commonly used in portable electronics gadgets which consume low power like watches, toys, RFID readers etc.
CR1632 Terminal Description
The upper side where the markings are found is the positive terminal
The lower side of the battery is the negative terminal.
Note: These batteries can be used only through a cell holder, soldering or tampering the battery is not recommended.
- Non-Rechargeable Lithium coin cell Battery
- Nominal Voltage: 3V
- Battery Capacity: 130mAh
- Continuous drain current: 0.19mA
- Peak drain current: 6.8mA
- Weight: 1.8 grams
Equivalent for CR1632
Other Lithium Coin Cells
CR1632 Lithium Cell
The CR1632 battery is very similar to CR2032 or CR2025 but they are not interchangeable because of their dimensions. The name CR1632 indicates that the battery is 16mm wide and 3.2mm thick. It is rated for 3V and 130mAh capacity.
How to calculate the run time of CR1632
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 is about 15K ohms at 20°C. Then in that case the mAh capacity of our battery is 130mAh. This means that if we draw 130mA, then our battery will last for 1 hour and similarly if we draw 65mA then the battery will last for 2 hours. But these batteries are rated for small output current, so if our load is consuming only about 0.19mA then the battery should last for (130/0.19) 684 hours. However this figure will not be accurate due to the varying current and operating temperature of the system. The CR1632 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 0.19mA @ 2.9V. And, pulse drain in every 2 seconds *12 times/delay at 400 ohms is 6.8mA @ 2.7V.
- Small PDA devices
- Wireless doorbell for house.
- Electronic Toys
- Potable electronics
- Digital thermometers
- Digital altimeter
- Heart rate monitors
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