Hideez Key comes with a pre-installed battery. The case is made of two halves latched together. To replace the battery, open the case and lift the gap between the halves with a fingernail or a plastic card. Do not use metal objects. Remove the old battery by pushing it from the inside using a narrow plastic object. Install the new CR2032 battery on the narrow side (minus contact) of the board. Hideez key will beep and start to work.

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