Powering Nano and Servo with single battery and 5v Regulator - General Electronics - Arduino Forum
Quick Answer: How To Power Arduino Nano - SeniorCare2Share
Small Footprint Arduino Nano With USB Charging Circuit (Li Ion or LIPO) That Can Turn Itself Off (soft Latch Power) : 8 Steps (with Pictures) - Instructables
How to Power Arduino Nano: Tutorial for Beginners - NerdyTechy
Arduino Nano with stepper motor and 9v battery - General Electronics - Arduino Forum