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Opening Nox Sleep Recorder Battery Door (Nox A1/A1s and Nox T3/T3s)

How to Correctly Open Nox Recorder Battery Door (Nox A1/A1s and Nox T3/T3s)

Please be advised that the Nox sleep recorder featured in this instructional video carries CE labeling, indicating its compliance with the relevant European health, safety, and environmental protection standards. The instructions provided in this video apply to all Nox sleep recorders produced by our company, not solely those with CE labeling. The specific device you are using may have different labeling and be subject to different regulations, depending on your local jurisdiction.

Always use the Nox Medical battery door key to open the battery door of Nox devices. Please don't use pens, as greater downward force is required to open the battery door, which can damage or break the door. Just so you know, using the correct technique, minimal downward pressure is required to open the battery door. 



To open the battery door, press lightly in the hole and, at the same time, slide the battery door towards the bottom of the device. Please avoid using too much pressure on top of the battery door.

We recommend contacting your local Nox supplier or contacting Nox Support directly to inquire about purchasing a new battery door key. This key is included with the Nox device when purchased. It is advisable to consider purchasing more than one key, especially for larger labs. To make sure you have a door opener readily available when needed, it is recommended to place one at the point of action, such as near your PC.

💡 Please download and use the postcard printout to correctly open the Nox Sleep Recorders (Nox A1/A1s and Nox T3/T3s). This is available at the bottom of the page in the attachments section. 

Tips to avoid damaging the Nox Recorder battery door

With the A1s/T3s, the battery door design is different and special care must be taken when closing the door. When closing the battery door, be careful not to push down too hard on the battery door where it attaches to the housing, as it could cause the housing to break. Instead, gently push the battery door closed without pushing down.


⚠️ The example below shows how not to push down on the battery lip when closing the door.


How to disconnect the Nox A1s/T3s from a computer

  1. When disconnecting the device from the computer, be careful not to push the battery door toward the USB cable. This can cause the battery door to bend or break. Remove the USB cable without pushing on the battery door. 

When you remove the supplied USB cable, as shown on the right side, you risk bending important hardware for battery contact on the door. This could lead to the device not powering on and needing repair. Below is the damage to the battery door that could occur if the user removes the USB cable while applying inward pressure on the door. This must be avoided to prevent device damage. 


Maintaining your Nox Recorder Battery Door

At Nox Medical, we engineer devices to meet industry standards, ensuring your experience is one of longevity and reliability. A key component that underscores this commitment is the battery door, designed with enhanced rigidity to provide water-resistant protection, meeting the stringent criteria outlined in the IEC 60529 standard.

While this improved door design offers superior protection, it's important to note that regular use may make the connection between the device body and battery floor flexible over extended use. This flexibility could lead to instances where the battery door breaks when opened with excessive pressure. For this reason, it is recommended that users always follow the instructions in this article for opening and closing the battery door. 

*Please note that not all features or all products are available in all markets. Our products are medical devices and subject to registration/approval in each market area. For more information on product availability please contact

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