diff --git a/labs/index.md b/labs/index.md
index 0719dfa..c7c82db 100644
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@@ -35,13 +35,13 @@ Saving Arduino sensor data to a microSD card so that we can use it later, and po
 - [Link to lab 3 - Group A](/labs/lab-3GroupA)
 - [Link to lab 3 - Group B](/labs/lab-3GroupB)
 
-<!--
 ## Lab 4: Power and Calibrations
 
-Creating a voltage regulating circuit to handle the power supply, and calibrating our complete circuit with known values.
+Creating a voltage regulating circuit to handle the power from the battery, and calibrating our complete circuit with known values.
 
 [Link to lab 4](/labs/lab-4)
 
+<!--
 ## Lab 5: Adding GPS
 
 Adding a digital GPS component to our Arduino breadboard circuit.