CR1632 Lithium Battery (Coin Cell)

10 April 2019 - 0 Comments

CR1632 Lithium Coin Cell

CR1632 Pinout

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

Pin Number	Pin Name	Description
1	Positive Terminal	The upper side where the markings are found is the positive terminal
2	Negative 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.

CR1632 specifications

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

DL1632, ECR1632

Other Lithium Coin Cells

CR2032, CR2025

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.