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Light 9g Micro Servo (RC plane helicopter Boat,...
SG90 9g servo is a high quality,low-cost servo for all your mechatronic needs.
This module includes Li-ion battery protection module (overcharge, over current, etc), charging function for battery (from power in) and step-up 5V output (VCC output) three functions.
Protection includes over use, over charge and over current.
How to use:
Blue LED on when charging, and then off when charging is done.