They did a live demo:<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=H5V0vL3nnHY" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=H5V0vL3nnHY</a><p>Here&#x27;s a closeup video where you can see the battery pack being lowered and another being pushed into place:<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HlaQuKk9bFg" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HlaQuKk9bFg</a>