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The primary battery cell is nestled in the center of the assembly, sealed within the housing to prevent moisture intrusion. This zinc-air coin cell powers both sensing and wireless systems for the entire wear period. Its position provides balance across the adhesive pad while isolating thermal and electrical interference from the sensing circuitry.
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It's a rugged, 16,000 mAh power bank with three ports, wireless charging, and a solar panel that could come in handy in an emergency.