> For the complete documentation index, see [llms.txt](https://enterprise.hideez.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://enterprise.hideez.com/hideez-key-enterprise-edition/battery-changing.md).

# Battery maintenance

Hideez Key comes with a pre-installed battery.

{% hint style="info" %}
In case your Key does not switch on, please, check if you [removed the white plastic](broken://pages/-MXYG2vTnlKdDom9GEZx#step-1-remove-isolating-material-from-the-keys-housing) from the Key's housing.
{% endhint %}

### Hideez Key 3

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.

![](/files/-MChpjRKYv_nrKwBTbuv)

Opening the case. 

![](/files/-MChpnsuW2StnmEJ4Wkj)

Change the battery.

{% hint style="info" %}
Notice: if you don’t want to change the battery by yourself, you can contact any electronic service center which replaces watch batteries. 
{% endhint %}

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.

### Hideez Key 4

To recharge the battery you need to plug Micro-USB connector to the corresponding port located on the side of the fob. Wait until led indicator becomes green. Hideez Key 4 will be ready for work.

![](/files/ea9EWCvaoISO924HuHqf)