diff --git a/README.md b/README.md
index ca83fee..edea2fd 100644
--- a/README.md
+++ b/README.md
@@ -105,11 +105,11 @@ Hardware: FT232 USB-UART adapter connected to UPDI with a 4.7 kΩ resistor.
 
 | Signal | PCB Usage         | LOW                      | HIGH                      |
 |--------|-------------------|--------------------------|---------------------------|
-| PA6    | Green LED         | LED **ON**               | LED OFF                   |
-| PA7    | Red LED           | LED **ON**               | LED OFF                   |
-| PA1    | LED 1–2           | LED(s) **ON**            | LED(s) OFF                |
-| PA2    | LED 3–6           | LED(s) **ON**            | LED(s) OFF                |
-| PA3    | LED 7–8           | LED(s) **ON**            | LED(s) OFF                |
+| PA6    | Green LED         | LED **ON**               | LED **OFF**               |
+| PA7    | Red LED           | LED **ON**               | LED **OFF**               |
+| PA1    | LED 1–2           | LED(s) **OFF**           | LED(s) **ON**             |
+| PA2    | LED 3–6           | LED(s) **OFF**           | LED(s) **ON**             |
+| PA3    | LED 7–8           | LED(s) **OFF**           | LED(s) **ON**             |
 | PA0    | Activation Button | Button **pressed** (GND) | Button released (pull-up) |
 
 ## License
diff --git a/main.c b/main.c
index 7e7001c..eacd981 100644
--- a/main.c
+++ b/main.c
@@ -31,6 +31,7 @@ volatile bool bBtnPressed = false;
 void blinkLed(bool resetCounters);
 static inline void leds_off(void);
 static inline void leds_on(void);
+static void battery_level_indicator(void);
 static void handleSwitch(void);
 
 /**
@@ -39,7 +40,7 @@ static void handleSwitch(void);
 int main(void)
 {
     // Configure LED pins as outputs
-    VPORTA.DIR = (PA1_SET_MASK | PA2_SET_MASK | PA3_SET_MASK | /*PA6_SET_MASK |*/ PA7_SET_MASK);
+    VPORTA.DIR = (PA1_SET_MASK | PA2_SET_MASK | PA3_SET_MASK | PA6_SET_MASK | PA7_SET_MASK);
 
     // Configure PA0 as input with pull-up
     VPORTA.DIR &= ~BUTTON_PIN_MASK;    // Input
@@ -47,7 +48,7 @@ int main(void)
 
     // Ensure all LEDs off at startup
     leds_off();
-    VPORTA.OUT &= (uint8_t)~PA7_SET_MASK;
+    battery_level_indicator(); // TODO: Implement
 
     bool bLedEnabledOld = bLedEnabled;
 
@@ -107,6 +108,15 @@ static inline void leds_on(void)
     VPORTA.OUT |= (PA1_SET_MASK | PA2_SET_MASK | PA3_SET_MASK);
 }
 
+/**
+ * @brief Battery monitoring
+ */
+static void battery_level_indicator(void)
+{
+    // TODO: Implement
+    VPORTA.OUT |= (PA6_SET_MASK | PA7_SET_MASK); // green + red OFF
+}
+
 /**
  * @brief Handle momentary switch input on PA0
  *