The CR2032 battery is the standard power source for Apple’s AirTag. But what if you want to use a rechargeable battery like the LIR2032? This article explores the compatibility of the LIR2032 with the AirTag, focusing on voltage and capacity differences. We’ll delve into why using the wrong battery can damage your device and what to consider when choosing a replacement.
Voltage Compatibility: A Critical Factor
The most significant difference between the CR2032 and LIR2032 lies in their voltage. The CR2032 operates at 3 volts, while the LIR2032 is a 3.6-volt lithium-ion battery. While this seemingly small difference might appear insignificant, it can have significant consequences for your AirTag.
Electronic devices, including AirTags, are designed to operate within a specific voltage range. Using a battery with a higher voltage than intended can damage the device’s internal circuitry. AirTags are designed to work with a voltage range of approximately 2-3 volts. A 3.6-volt LIR2032 exceeds this range, posing a risk of irreversible damage.
To understand this better, consider how other devices handle voltage variations. For instance, an 18650 battery’s voltage changes throughout its discharge cycle. A fully charged 18650 might have a voltage of 4.2 volts, dropping to around 2.75 volts when depleted. Devices using these batteries incorporate components that tolerate this voltage range. However, the AirTag’s circuitry lacks this tolerance for the higher voltage of the LIR2032.
Capacity (mAh) Considerations: Runtime, Not Compatibility
Another difference between the CR2032 and LIR2032 is their capacity, measured in milliampere-hours (mAh). The LIR2032 typically has a lower mAh rating than the CR2032. While a lower mAh means shorter battery life and more frequent recharging, it doesn’t inherently impact compatibility. mAh represents the battery’s capacity to store energy, indicating how long it can power a device before needing replacement or recharge. It does not determine the current the battery can deliver.
Critically, it’s important to differentiate between mAh (capacity) and mA (current). The device draws the necessary current (mA) to function. Using a battery with insufficient current output can lead to performance issues or prevent the device from working altogether. You should always ensure a replacement battery can provide at least the same current as the original.
Conclusion: Sticking with the CR2032 for AirTag
While the LIR2032 is a rechargeable alternative, its higher voltage makes it unsuitable for the AirTag. The risk of damaging your AirTag outweighs the benefits of using a rechargeable battery in this case. To maintain the longevity and functionality of your AirTag, it’s recommended to stick with the manufacturer-recommended CR2032 battery. Always prioritize using the correct battery for your device to avoid potential damage and ensure optimal performance.
