Accelerometers can be used to save power in battery applications with their inherent features. Low power consumption is extremely important for battery powered applications.  A low power Accelerometer can be used to detect motion by enabling the motion wake up engine embedded feature within the KXCJB while still operating only at 1.8 µA. Power consuming devices can remain inactive or in a low power / sleep state until the KXCJB sends the motion interrupt to the host device to react. Another feature is the directional tap engines that can be utilized to turn on / off the device. For example you can tap your device in a certain direction to turn off the device or put into sleep mode. The Directional Tap/Double Tap Engine can also be used to replace buttons on your device.  Additionally, the screen orientation engine reports changes in face up, face down, vertical and horizontal orientation which can be set up to turn ON the display of the device only when face up and turn off the display when face down.  Finally, in the case of the KX112, there is a 2,048 Byte FIFO buffer, which is significantly larger than most other accelerometers. This provides about 10 to 15 seconds of motion capture under typical configuration and allows significant power savings as the rest of the system can sleep while the accelerometer is monitoring and recording motion data.