Get every last drop of battery life. <div class="heading_image responsive-img img-size-heading-image-full-width mobile-optimized expandable " src="https://static1.howtogeekimages.com/wordpress/wp-content/uploads/2024/04/an-apple-watch-displaying-battery-life.jpg" data-modal-id="single-image-modal" data-modal-container-id="single-image-modal-container" data-img-caption=""Lucas Gouveia / How-To Geek | Alex Segre/Shutterstock””> Lucas Gouveia / How-To Geek | Alex Segre/Shutterstock Smartwatches are some of the smallest gadgets we use every day, which means they also have some of the smallest batteries. Every…