Battery, Controller, Motor, or Display? How to Accurately Identify the Weak Link in Electric Bikes

Electric bikes fail in patterns—not random or usually dramatic ones. Power loss, cut-outs, inconsistent assistance, or incorrect readings almost always originate from one of four components: the battery, the controller, the motor, or the display. The difficulty lies in the fact that all four can produce overlapping symptoms, especially under load, which is why electric bike repair often goes wrong.

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