We blogged about Samsung’s ingenious “Wall Huggers” promo video for its flagship smartphone last month, which captured the attention of Galaxy S5 fans and critics alike. Samsung has always been on the forefront of experimenting with new marketing methods, but even this was a first. Apparently, however, the Wall Huggers video did well, because the South Korean-based tech company released yet another Galaxy S5 promotion video. Published July 18, 2014 to the video-sharing site YouTube, “Galaxy S5 One Charge Challenge: Coast to Coast” is a promotional video that showcases the Galaxy S5’s Ultra Power Saving Mode. As the video title suggests, it follows two men who travel from coast to coast without recharging their battery. And in case you were wondering, the guys in the Galaxy S5 One Charge Challenge: Coast to Coast video still sent text messages, snapped photos, and even took videos — all processes that require battery power. This video is a true testament to the Galaxy S5’s phenomenal battery life, as well as its highly efficient Ultra Power Saving Mode. According to Samsung, the two guys in the video sent 85 text messages, snapped 119 photos, shot over 4 minutes of video, and talked for over 16 minutes…