One of the questions we hear most often in Customer Service is “How long does the UbiDuo battery last?” When used properly, the UbiDuo’s battery should last 4 to 6 hours with the backlight on and 6 to 8 hours with the backlight off. To prolong the life of the battery (and what we mean by “proper use”), keep your UbiDuo plugged in if it is in one location and powered on all day. For example, if you work in an office and your UbiDuo is at your desk powered up for face to face conversations with coworkers, keep it plugged in to conserve battery power. Whenever you leave your desk, just unplug it then fold up the 2 halves and carry it with you. Also, recharge your UbiDuo each night. This helps prolong the life of the battery. When you plug the power cord into the UbiDuo, you will see either a yellow or a green light. Yellow means the battery is low. Green means it is fully charged. Keep the power cord plugged in until the yellow light indicator turns green. That means it’s fully charged, and you’re ready to go! One last thing about charging the batteries is to make sure the power cords are plugged in all the way and the power cord is plugged in all the way into the black powerbox.