The electric wrench will turn on without load, the work will not turn, the lantern will flash
The key issue is not the wrench itself, but screw position, universal wrench if possible on a smooth surface is better than that of China wrench, but in certain circumstances, or Chinese wrench, each have their own advantages, I was such a spanner does not mind his toolbox
Lack of power or battery damage, you can buy a new one on Taobao. Battery core can also be assembled
