diff --git a/source/arm11/main.c b/source/arm11/main.c
index 6014f76..d769595 100644
--- a/source/arm11/main.c
+++ b/source/arm11/main.c
@@ -59,7 +59,7 @@
 		if(hidstate & MCU_HID_POWER_BUTTON_PRESSED)
 		{
 			if(poweroff_allowed)	// direct power off allowed?
-				turn_off();
+				power_off();
 			PXI_trySendWord(PXI_RPL_POWER_PRESSED);
 		}
 
diff --git a/source/arm11/power.c b/source/arm11/power.c
new file mode 100644
index 0000000..ca2eee2
--- /dev/null
+++ b/source/arm11/power.c
@@ -0,0 +1,47 @@
+#include "types.h"
+#include "util.h"
+#include "arm11/i2c.h"
+
+bool battery_ok(void)
+{
+	u8 state;
+	
+	if(!i2cmcu_readregdata(0xF, &state, 1))
+		return false;
+	
+	// battery charging, this should be fine
+	if((state >> 4) & 1)
+		return true;
+	
+	if(!i2cmcu_readregdata(0xB, &state, 1))
+		return false;
+	
+	if(state >= 10)	// 10% should be enough
+		return true;
+	
+	return false;
+}
+
+void power_off(void)
+{
+	i2cmcu_lcd_poweroff();
+	i2cmcu_lcd_backlight_poweroff();
+	
+	for(;;)
+	{
+		i2c_writeregdata(3, 0x20, 0xff);
+		wait(0x200000);
+	}
+}
+
+void power_reboot(void)
+{
+	i2cmcu_lcd_poweroff();
+	i2cmcu_lcd_backlight_poweroff();
+	
+	for(;;)
+	{
+		i2c_writeregdata(3, 0x20, 0x04);
+		wait(0x200000);
+	}
+}