In this article we will guide you through the following sub-topics:

1. How to make sure your Envision Glasses are powered off?
2. How does the battery of your Envision Glasses operate? 
3. How to check if the battery performance is behaving as expected?
4. What are the next steps in case the battery of your Envision Glasses does not perform normally?

How to make sure your Envision Glasses are powered off?

To turn off your Envision Glasses, press and hold the button for 3 seconds. You will hear a sound when the Envision Glasses initiate the power-off process, which completes in 20 seconds.

We recommend shutting down Envision Glasses if you are not going to use them for the next three hours. If you are going to use them in the next three hours, we recommend that you simply put them in Sleep Mode. To learn more about this topic, please see Power Button

Envision Glasses will automatically turn on when you unfold them or when you plug them into a charger, even if you have already turned them off. We recommend that when you turn them off, you fold them up and put them in the protective case to ensure that the glasses will have battery power when you need them.

On the other hand, if you have any visual assistance, the power LED located at the end of the right arm next to the charging port, lights up when Envision Glasses are turned on and when they are charging. Therefore, a confirmation that the glasses are completely off is if the power LED is not blinking.

How does the battery of your Envision Glasses operate? 

• Battery Life
  • Envision consumes most of the battery when in use due to the need to have the camera active and light detection when using all features.
  • Envision Glasses can be used for 4 to 6 hours per day in normal use conditions. Normal use means using a few Envision Glasses features once every hour or a couple of hours, not consecutively. If the glasses are used non-stop, the battery will drain faster.
  • As batteries do not work in a linear fashion, some devices drain battery power easily from 100% to 80% and from 80% to 40% a little slower. If that happens with your Envision Glasses it is definitely normal behaviour.
  • Even if the glasses are turned off or in Sleep Mode, it is normal for the battery to discharge, this behavior is similar to all electronic devices that use lithium batteries. The discharge will be more noticeable compared to other devices, as Envision Glasses hardware has a small module which, compared to the battery of a phone or other larger devices, will have a considerably shorter life.
  • Lithium-ion batteries need to maintain a certain voltage to work properly. If the voltage drops, even if the battery still has charge left, the device may not be able to start until it receives enough charge to bring the voltage back up. This behaviour is often referred to as battery threshold lockout. This feature is designed to protect the battery and the device from damage and ensures safe and reliable operation.
• Powering Envision Glasses after a long period of disuse
  • If you haven't charged Envision Glasses for a couple of days/weeks, it may take longer to charge them. In this state, it's normal that Envision Glasses won't turn on when you press the Power Button. But don't worry. Grab a cup of coffee and return in a bit, and Envision Glasses should turn on normally. For more information, please see Taking Care Of Envision Glasses
• Take advantage of a fast charging adapter
  • Envision Glasses support fast charging, therefore you can use the supplied cable in the box with an adapter that supports fast charging. Fast charging allows you to charge the device to 50% in less than 30 minutes.
  • When having charging problems, we recommend to please check the power outlets, the USB-C charging cable and the power adapter. Disclaimer: Plugging Envision Glasses with the charging cable into a computer will not charge the device, nor will they be recognized on a desktop or computer. 
• Be prepared when leaving home
  • Ultra-capacity power banks are a great help if you are planning to spend a lot of time away from home. A tip would be to look for one with at least 20,000mAH as this will allow you to charge your Envision Glasses and even your phone more than once when using it as a personal hotspot.

How to check if the battery performance is behaving as expected?

Based on the above information, rest assured that the battery of your Envision Glasses is performing as expected, if: 

1. Your Envision Glasses can be used for 4 to 6 hours per day in normal use conditions. Normal use means using a few Envision Glasses features once every hour or a couple of hours, not consecutively. If the glasses are used non-stop, the battery will drain faster.
2. Compared to the battery of a phone or other larger devices, they will have a considerably shorter battery life.
3. The battery will discharge even if your Envision Glasses are turned off or in Sleep Mode, this behavior is similar to all electronic devices that use lithium batteries. The discharge will be more noticeable compared to other devices, as the Envision Glasses hardware has a small module that, compared to the battery of a phone or other larger devices, will have a considerably shorter lifetime.
4. If you haven't charged Envision Glasses for a couple of days/weeks, it may take longer to charge them.

What are the next steps in case the battery of your Envision Glasses does not perform normally?

A case in which the battery may require replacement would be a discharge from 100% to 0% in less than 10 hours without active use or if you detect an abnormal behavior of the battery that is not mentioned above as normal behavior.

In this case, please inform us directly at support@letsenvision.com, as we would need to perform a final examination of your Envision Glasses, which will require the device to be shipped to our offices in order for us to perform the appropriate tests and deliberate whether it is a hardware issue that requires replacement or is related to other factors.

This examination is performed by our Glasses Engineering and Design Teams, once your unit is received.