diff --git a/FAQ.md b/FAQ.md
index c3933ba9..780d5aff 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -487,6 +487,18 @@ Make sure you are not running NetGuard in whitelist mode (check the NetGuard def
 Some Android versions contain a bug resulting in all internet traffic being blocked.
 Mostly you can workaround this bug by enabling filtering in the advanced NetGuard settings.
 
+<a name="FAQ52"></a>
+**(52) What is lockdown mode?**
+
+In lockdown mode all traffic for all applictions will be blocked,
+except for applications with the option '*Allow in lockdown mode*' enabled.
+You can use this mode to limit battery usage or network usage
+for example when your battery is almost empty or when your data bundel is almost used.
+Note that system applications will only be blocked in this mode
+when managing system applications is enabled in the advanced settings.
+
+You can enable/disable lockdown mode in the main menu, using a widget or using a settings tile (Android 7 Nougat or later).
+
 <br />
 
 **NetGuard is supported for phones and tablets only, so not for other device types like on a television or in a car.**
diff --git a/README.md b/README.md
index 77662faa..60eeab6e 100644
--- a/README.md
+++ b/README.md
@@ -232,6 +232,9 @@ Frequently Asked Questions (FAQ)
 <a name="FAQ51"></a>
 [**(51) NetGuard blocks all internet traffic!**](https://github.com/M66B/NetGuard/blob/master/FAQ.md#FAQ51)
 
+<a name="FAQ52"></a>
+[**(52) What is lockdown mode?**](https://github.com/M66B/NetGuard/blob/master/FAQ.md#FAQ52)
+
 Support
 -------