I am using four rechargeable AA batteries in series to power an arduino nano. Should I be using the 5V pin or the VIN pin? Also would this be a regulated or unregulated power source?
Thanks retrolefty. That was very helpful. Could I use a 9v battery in the VIN pin or could that damage the arduino? I've read many varying opinion's online. I'm wondering what the best battery option would be to power the arduino and 5 servos. Wouldn't 4 AAs drain very quickly?