diff --git a/code/main.c b/code/main.c
index a4e9b28..ea33198 100644
--- a/code/main.c
+++ b/code/main.c
@@ -22,6 +22,7 @@
 #define BATTERY_TEMP			8
 
 #define BATTERY_MILLIOHM		30
+#define BATTERY_CAPACITY_MAH	2200
 
 #define BATTERY_CHARGE_MULT		67
 #define BATTERY_CHARGE_DIV		(10 * BATTERY_MILLIOHM)
@@ -1019,6 +1020,38 @@ void print_option(uint8_t option)
 
 void print_battery_icon()
 {
+// Battery Percent
+#if 0
+	static uint8_t old_symbols[3] = {0xFF, 0xFF, 0xFF};
+	uint32_t percent = BATTERY_CAPACITY_MAH;
+	uint8_t i;
+	uint8_t symbol;
+	uint8_t is_first = 1;
+
+	// Calculate percent
+	percent -= battery_mAh;
+	percent *= 100;
+	percent /= BATTERY_CAPACITY_MAH;
+
+	// Print percent top to bot
+	for (i = 3; i > 0; --i)
+	{
+		symbol = extract_digit(percent, i);
+		if ((0 == symbol) && (is_first) && (i != 1))
+		{
+			symbol = 0xFF;
+		}
+
+		// 3,2,1 -> 1,2,3
+		if (symbol != old_symbols[3 - i + 1])
+		{
+			print_symbol(symbol, OLED_X_SIZE - (CHAR_SIZE + 1) * 2, 3 - i + 1, 0);
+			old_symbols[3 - i + 1] = symbol;
+		}
+	}
+#endif
+
+// EEPROM IDX
 #if 0
 	uint32_t idx = (uint32_t) eeprom_idx;
 
@@ -1029,6 +1062,7 @@ void print_battery_icon()
 	}
 #endif
 
+// Graphic Icon
 #if 0
 	static uint8_t old_percent = 0xFF;
 	uint8_t buf[BUFF_SIZE];