While wearing EVO, you should only lift the same amount of weight as you would without the device on.

EVO provides 5 – 15 lb. (2.2 – 6.8 kg) of list assistance per arm to give your natural strength a boost throughout your work day.  This is NOT intended to give you super strength but instead give you super endurance and reduce fatigue so that you have more energy and less soreness at the end of your shift.  Whatever payload you normally lift (a 4 lb. torque wrench, a 10 lb. component, or even just the weight of your arm) will feel lighter with the boost you get from your EVO.