diff --git a/lib/SparkFun_ADXL345_Arduino_Library/keywords.txt b/lib/SparkFun_ADXL345_Arduino_Library/keywords.txt
index 2c8681acc..6560dcbcd 100644
--- a/lib/SparkFun_ADXL345_Arduino_Library/keywords.txt
+++ b/lib/SparkFun_ADXL345_Arduino_Library/keywords.txt
@@ -20,6 +20,7 @@ SparkFunADXL345	KEYWORD1
 #######################################
 
 powerOn	KEYWORD2
+powerOff	KEYWORD2
 getDevID	KEYWORD2
 setActivityXYZ	KEYWORD2
 setActivityThreshold	KEYWORD2
diff --git a/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.cpp b/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.cpp
index 1c19273f6..7053af1fb 100644
--- a/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.cpp
+++ b/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.cpp
@@ -64,6 +64,14 @@ void ADXL345::powerOn() {
   writeTo(ADXL345_POWER_CTL, 8);  // Measure
 }
 
+void ADXL345::powerOff() {
+  byte _b;
+
+  readFrom(ADXL345_POWER_CTL, 1, &_b);
+  _b &= ~(0b00001000); // Measure bit
+  writeTo(ADXL345_POWER_CTL, _b);
+}
+
 int ADXL345::getDevID() {
   byte _b;
 
diff --git a/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.h b/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.h
index 618fdff9a..c8cfb7750 100644
--- a/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.h
+++ b/lib/SparkFun_ADXL345_Arduino_Library/src/SparkFun_ADXL345.h
@@ -117,6 +117,7 @@ public:
   ADXL345(uint8_t i2c_addr);
   ADXL345(int CS);
   void powerOn();
+  void powerOff();
   int  getDevID();
   void readAccel(int *xyx);
   void readAccel(int *x,