When I connect the Raspberry Pi to my Nybble and walk it, the Raspberry Pi is easy to reset. Please tell me how to improve it.I dial the potentiometer clockwise to get the lowest voltage to the servo. And I use the following lithium polymer battery.
Turnigy nano-tech 2000mAh 2S (2cell / 7.4V) 20 ~ 40C
200g should be ok.
The key parameter is the voltage and continuous discharging rate. The recommended voltage should be <8.4V, and discharging current should be >3A.
No, too high voltage will damage the servos. You can actually try some lower voltage but with larger C rate(discharging rate)
If you are using the NyBoard V0_2, you can connect the jumper switch SW3 between BATT and V_S. The potentiometer will be bypassed to provide the unlimited power. The bottleneck will then be the battery.