Each data logger has an on-board battery. If the logger detects an external power supply (the logger is plugged into the USB port of the PC or powered by the 5VDC wall adapter) the battery line is cut off to preserve the battery life.
Each data logger has an on-board battery. If the logger detects an external power supply (the logger is plugged into the USB port of the PC or powered by the 5VDC wall adapter) the battery line is cut off to preserve the battery life.