What is the reason that the electric spanner doesn't grip the Gong silk?
Manifold. 1, the battery degradation, internal resistance to large, full work when the high current can not be put out. 2, DC motor commutator (Tan Shua) wear serious, high current can not effectively let the motor work.
If the machine is a burst, consider one of the batteries in the battery, the drive circuit board is usually very little problem. According to my experience, the battery pack accounts for forty percent of the machine's performance.
