There is system for power management for radio frequency identification (RFID) tag asset tracking systems where the tag has a transceiver, configured to control RFID communication of the RFID tag, an accelerometer, configured to determine and communicate whether the tag is in motion and a microcontroller unit (MCU), to control operation of the RFID tag and operably connected to, and in communication with, the accelerometer and the transceiver, wherein the MCU awakens, based on a trigger and receives, from the accelerometer, whether the accelerometer is moving, and if it is moving then provide power to other parts of the tag, otherwise transition to a sleep mode to conserve power.