diff --git a/slave/slave/lib/inputOutput.c b/slave/slave/lib/inputOutput.c
--- a/slave/slave/lib/inputOutput.c
+++ b/slave/slave/lib/inputOutput.c
@@ -28,11 +28,11 @@ int8_t	moduleID;	// Slave Module ID from
 
 	ADCSRA |= (1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0);	// Set prescaler for ADC, 128 gives ADC freq of 125 KHz
 	ADMUX |= (1 << REFS0);									// Set ADC reference voltage to AVCC
-	ADMUX |= (1 << ADLAR);									// Sets 10 bit ADC to 8 bit
+	//ADMUX |= (1 << ADLAR);									// Sets 10 bit ADC to 8 bit
 	ADMUX |= (1 << MUX2) | (1 << MUX1) | (1 << MUX0);		// Select ADC7 as the conversion channel
 	ADCSRA |= (1 << ADATE);									// Enables auto trigger, determined in ADCSRB bits ADTS
 	//ADCSRA |= (1 << ADIF);									// 
-//ADCSRA |= (1 << ADIE);									// ADC interrupt enable set
+	//ADCSRA |= (1 << ADIE);									// ADC interrupt enable set
 	ADCSRB &= ~((1 << ADTS2) | (1 << ADTS1) | (1 << ADTS0));	// Set ADC auto trigger source to free running mode
 	ADCSRA |= (1 << ADEN);									// Enable ADC
 	ADCSRA |= (1 << ADSC);									// Start ADC measurements.  ADC should now continuously run conversions, which are stored in ADCH 0x79
diff --git a/slave/slave/lib/sensors.c b/slave/slave/lib/sensors.c
--- a/slave/slave/lib/sensors.c
+++ b/slave/slave/lib/sensors.c
@@ -18,7 +18,6 @@
 
 int16_t	spiTemp;	// Thermocouple Temperature (from spi)
 int8_t	boardTemp;	// Board Temperature (from i2c)
-//Should these two be int16_t?  CHANGED TO INT32 BASED ON DATASHEET
 int32_t ut;			// Temperature from BMP085 (from i2c)
 int32_t up;			// Pressure from BMP085 (from i2c)
 uint16_t humid;		// Humidity (from i2c)
@@ -27,7 +26,8 @@ uint8_t lightL;		// Lower byte from ligh
 uint8_t exponent;	// Exponent for Lux
 uint8_t mantissa;	// Mantissa for Lux
 uint32_t lux;		// Calculated Lux value
-int8_t batt;		// Read battery voltage from ADC
+uint8_t battL;		// Low byte of ADC
+uint16_t batt;		// Read battery voltage from ADC
 
 int16_t ac1;		// The following 11 variables are the calibration values for the BMP085
 int16_t ac2;
@@ -186,7 +186,6 @@ void sensors_readPressure()
 	x2 = (-7357 * pressure) >> 16;
 	pressure += (x1 + x2 + 3791) >> 4;				//This is the final value for our pressure
 	
-	//altitude = 44330 * (1 - pow((pressure / 101325), (1 / 5.255)));
 	altitude = (float)44330 * (1 - pow(((float) pressure/101325), 0.190295));
 }
 
@@ -200,7 +199,6 @@ void sensors_readHumid()
 
 void sensors_readLux()
 {
-	// FOR FIRST BYTE:
 	lightH = i2c_read(LIGHT_ADDR, 0x03);
 	lightL = i2c_read(LIGHT_ADDR, 0x04);
 	
@@ -209,23 +207,16 @@ void sensors_readLux()
 	
 	lightH = lightH << 4;
 	mantissa = lightH | lightL;
-	//mantissa = mantissa << 4;
-	//mantissa = mantissa >> 4;
-	
-	//lux = (pow(2, exponent) * (float)(mantissa * 0.045));
+
 	lux = (float)(pow(2,exponent) * mantissa) * 0.045;
-	
-	// FOR BOTH BYTES:
-	// light = light << 4;
-	// light = light | (0x0F & i2c_read(LIGHT_ADDR, 0x04));  //  This can be used to read in the 4 LSBs from the second register
-	// exponent = 8xE3 + 4xE2 + 2xE1 + E0
-	// mantissa = 128xM7 + 64xM6 + 32xM5 + 16xM4 + 8xM3 + 4xM2 + 2xM1 + M0
-	// light = 2^(exponent)*mantissa*0.045
 }
 
 void sensors_readBatt()
 {
-	batt = ADCH;					// Read battery level from ADC
+	battL = ADCL;					// Read low battery byte from ADC (all 8 bits)
+	batt = ADCH;					// Read high battery byte from ADC (only two LSBs)
+	batt = batt << 8;
+	batt |= battL;
 }
 
 int16_t sensors_getSpiTemp(void)	// Gets spi temperature from variable
@@ -253,8 +244,7 @@ uint32_t sensors_getLux(void)		// Gets l
 	return lux;
 }
 
-//possibly uint8_t
-int8_t sensors_getBatt(void)		// Gets battery voltage from variable
+uint16_t sensors_getBatt(void)		// Gets battery voltage from variable
 {
 	return batt;
 }
diff --git a/slave/slave/lib/sensors.h b/slave/slave/lib/sensors.h
--- a/slave/slave/lib/sensors.h
+++ b/slave/slave/lib/sensors.h
@@ -23,7 +23,7 @@ int8_t sensors_getBoardTemp(void);	// Ge
 int32_t sensors_getPressure(void);	// Gets pressure from variable
 uint16_t sensors_getHumid(void);	// Gets humidity from variable
 uint32_t sensors_getLux(void);		// Gets lux from variable
-int8_t sensors_getBatt(void);		// Gets battery voltage from variable
+uint16_t sensors_getBatt(void);		// Gets battery voltage from variable
 uint32_t sensors_getAltitude(void);	// Gets altitude from variable
 
 #endif /* SENSORS_H_ */
\ No newline at end of file
diff --git a/slave/slave/slave.c b/slave/slave/slave.c
--- a/slave/slave/slave.c
+++ b/slave/slave/slave.c
@@ -82,7 +82,7 @@ int main(void)
 			
 			io_regulateTemp();			// Gets board temperature and enables heater if below threshold
 
-			snprintf(buff,128,"|ModuleID: %u |BoardTemp: %i |Millis: %lu |Lux: %lu |Pressure: %lu |Altitude: %lu |Battery: %i \r\n ",io_getModuleId(),sensors_getBoardTemp(),time_millis(),sensors_getLux(),sensors_getPressure(),sensors_getAltitude(),sensors_getBatt()); //DEBUG
+			snprintf(buff,128,"|ModuleID: %u |BoardTemp: %i |Millis: %lu |Lux: %lu |Pressure: %lu |Altitude: %lu |Battery: %u \r\n ",io_getModuleId(),sensors_getBoardTemp(),time_millis(),sensors_getLux(),sensors_getPressure(),sensors_getAltitude(),sensors_getBatt()); //DEBUG
 			serial0_sendString(buff); //DEBUG
 
 			_delay_ms(2);		// Delay to prevent the sensor loop from running again before time_millis changes