Berkeley Robotics and Human Engineering Laboratory  Berkeley Robotics and Human Engineering Laboratory is managed and operated by University of California, Berkeley. The lab conducts scientific research on the design and control of a class of robotic systems worn or operated by humans to increase human mechanical strength. The Berkeley Lower Extremity Exoskeleton, commonly abbreviated Bleex, is an intelligent, bionic exoskeleton system that provided soldiers, disaster relief workers, wildfire fighters, and other emergency personnel the ability to carry major loads. "ExoHiker" was designed to help hikers carry heavy loads on their back, up to 150 pounds, over extended periods of time. Its design was completed by February 2005. The battery powered skeletal system is controlled with a handheld LCD display. It can be strapped on to the body of hiker between 5 ft 4in and 6 ft 2in in height, like a wearable robot. The skeleton is easy to put on and take off. Altogether, the "ExoHiker" weighs 31 pounds, and is virtually noiseless. It can operate at an average speed of 2.5 mph for 42 miles with just one 80 Watt-hour lithium polymer battery weighing 1.2 pounds. With a small solar panel, its "mission time" can be unlimited. In 2010 The lab unveiled "eLEGS", which stands for "Exoskeleton Lower Extremity Gait System." "eLEGS" is another hydraulically powered exoskeleton system, and allows paraplegics to stand and walk with crutches or a walker. The computer interface uses force and motion sensors to monitor the user's gestures and motion, and uses this information to intelligently interpret the intent of the user and translate it into appropriate action. Users can "put on and take off the device by themselves as well as walk, turn, sit down, and stand up unaided". In 2011 "eLEGS" was renamed "Ekso". "Ekso" weighs 45 pounds (20 kg), has a maximum speed of 2 mph (3.2 km/h) and a battery life of 6 hours. It is suitable for users weighing up to 220 pounds, who are between 5 ft 2in and 6 ft 4in tall and can transfer themselves from a wheelchair to a chair. It allows the user to "walk in a straight line, stand from a sitting position, stand for an extended period of time, and sit down from a standing position". "Ekso" is currently undergoing further development and clinical trials in rehabilitation centers.