Battery And Power Supply
If an EZB microcontroller is often disconnecting, the batteries or power source is not providing enough current for the servos. When this happens, it is called a "Brown Out." That means the EZB controller is not getting enough power when the servos move. In this case, the solution is to replace the power source with one providing higher amperage. A wall-wart (power adapter) will not provide enough current for electro-mechanical servo motors. We recommend using the power supply tutorial and exploring options for powering robots.