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Wondering what kind of technology keeps the tracking device powered? Let's remove the battery pack's end cap and find out.

The device is powered by four lithium-thionyl chloride (Li-SOCl2) D cell batteries.

Each cell is good for 13,000 mAh! That's about double the capacity of the iPad 2's battery.

These cells are suited for extremely low-draw applications where longevity is needed, making them ideal for powering an always-on transmitter/receiver. Their service life is rated at 10 to 20 years.

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