---
title: "How can I extend the runtime of my M-Series smart glasses?"
slug: "how-can-i-extend-the-runtime-of-my-m-series-smart-glasses"
updated: 2024-01-23T20:55:10Z
published: 2024-01-23T20:55:10Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://support.vuzix.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How can I extend the runtime of my M-Series smart glasses?

To extend the runtime of your M-Series Smart Glasses, connect an external USB battery to the USB Micro-B port on the M-Series Battery Pod. Alternatively, you can use the optional M-Series Micro USB Power Adapter and connect the external USB battery directly to the M-Series Smart Glasses main unit.

You can purchase additional external USB batteries and the optional USB power adapter for the M-Series Smart Glasses in our Accessory section [here.](https://www.vuzix.com/Products/Accessories)