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 start to work.
The estimated operation time of Hideez Key is up to 6 months, depending on usage and the quality of the battery. The highest energy consumption occurs when using audio signals on the Hideez Key.