• Practical endurance test- Test voltage : 18V- Work material : Grass- Extension cord : Nothing- Target time : 50/100 hours- Accessory : Nylon cordYou stop work in 50 hours and confirm whether product does not have an irregularity, and please inform MJ of a result.If there is not an irregularity, please carry it out until 100h.- Time of shear blade exchange : When cutter part of shear blade is lacking, please change it.- Point of temperature measurements : Surface of motor (1 point)• Test method- Please perform the test in Nylon cord.- Check inside oof the machine after the test of 50h. and contact MJ.- Please measure the temperature and the electric current value at the time of the consecutive using for two battery by high speed mode per 10 hours (including 0 hours).- Please measure the temperature of motor with loading. (Once a day)【不具合状況 / Defective Condition】• At load time 39.6 h. When insert battery and press switch lever found the product didn't operate and after check inside to investigate the cause found the motor have abnormal operate..