diff --git a/app/app.pro b/app/app.pro
index b4efb69..b5d6437 100644
--- a/app/app.pro
+++ b/app/app.pro
@@ -25,10 +25,10 @@ CONFIG(debug, debug|release) {
 }
 
 # Directories
-FBREADER_DIR = $$_PRO_FILE_PWD_/../fbreader
-FRIBIDI_DIR = $$_PRO_FILE_PWD_/../fribidi
-LINEBREAK_DIR = $$_PRO_FILE_PWD_/../linebreak
-HARBOUR_LIB_DIR = $$_PRO_FILE_PWD_/../harbour-lib
+FBREADER_DIR = ../fbreader
+FRIBIDI_DIR = ../fribidi
+LINEBREAK_DIR = ../linebreak
+HARBOUR_LIB_DIR = ../harbour-lib
 
 HARBOUR_INCLUDE_DIR = $$HARBOUR_LIB_DIR/include
 HARBOUR_SRC_DIR = $$HARBOUR_LIB_DIR/src
@@ -194,6 +194,7 @@ openrepos {
 
 HEADERS += \
   $$HARBOUR_INCLUDE_DIR/HarbourBase45.h \
+  $$HARBOUR_INCLUDE_DIR/HarbourBattery.h \
   $$HARBOUR_INCLUDE_DIR/HarbourColorEditorModel.h \
   $$HARBOUR_INCLUDE_DIR/HarbourDisplayBlanking.h \
   $$HARBOUR_INCLUDE_DIR/HarbourJson.h \
@@ -206,6 +207,7 @@ HEADERS += \
 
 SOURCES += \
   $$HARBOUR_SRC_DIR/HarbourBase45.cpp \
+  $$HARBOUR_SRC_DIR/HarbourBattery.cpp \
   $$HARBOUR_SRC_DIR/HarbourColorEditorModel.cpp \
   $$HARBOUR_SRC_DIR/HarbourDisplayBlanking.cpp \
   $$HARBOUR_SRC_DIR/HarbourJson.cpp \
diff --git a/app/qml/BooksMain.qml b/app/qml/BooksMain.qml
index 4824e29..f3eebc0 100644
--- a/app/qml/BooksMain.qml
+++ b/app/qml/BooksMain.qml
@@ -1,6 +1,6 @@
 /*
   Copyright (C) 2015-2021 Jolla Ltd.
-  Copyright (C) 2015-2021 Slava Monich <slava.monich@jolla.com>
+  Copyright (C) 2015-2023 Slava Monich <slava@monich.com>
 
   You may use this file under the terms of BSD license as follows:
 
@@ -52,10 +52,12 @@ ApplicationWindow {
 
     property variant currentShelf: mainPage.currentShelf
 
-    DisplayBlanking {
+    HarbourDisplayBlanking {
         pauseRequested: Qt.application.active &&
-            Settings.currentBook &&
-            Settings.keepDisplayOn
+            Settings.currentBook && Settings.keepDisplayOn &&
+            (HarbourBattery.batteryState === HarbourBattery.BatteryStateCharging ||
+             HarbourBattery.batteryLevel === 0 || // Zero if unknown (not reported by mce)
+             HarbourBattery.batteryLevel >= 20)
     }
 
     Binding {
diff --git a/app/src/main.cpp b/app/src/main.cpp
index 2593dce..a10fb45 100644
--- a/app/src/main.cpp
+++ b/app/src/main.cpp
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2015-2022 Jolla Ltd.
- * Copyright (C) 2015-2022 Slava Monich <slava.monich@jolla.com>
+ * Copyright (C) 2015-2023 Slava Monich <slava@monich.com>
  *
  * You may use this file under the terms of the BSD license as follows:
  *
@@ -52,6 +52,7 @@
 #include "BooksHints.h"
 #include "BooksUtil.h"
 
+#include "HarbourBattery.h"
 #include "HarbourColorEditorModel.h"
 #include "HarbourDisplayBlanking.h"
 #include "HarbourDebug.h"
@@ -96,14 +97,15 @@ Q_DECL_EXPORT int main(int argc, char **argv)
     BOOKS_QML_REGISTER_(BooksPageWidget, "PageWidget");
     BOOKS_QML_REGISTER_(BooksListWatcher, "ListWatcher");
     BOOKS_QML_REGISTER_(BooksCoverWidget, "BookCover");
-    BOOKS_QML_REGISTER_(HarbourDisplayBlanking, "DisplayBlanking");
 
     // But these do (and I think it's a good idea)
     BOOKS_QML_REGISTER(HarbourColorEditorModel);
+    BOOKS_QML_REGISTER(HarbourDisplayBlanking);
     BOOKS_QML_REGISTER(BooksColorSchemeModel);
     BOOKS_QML_REGISTER(BooksImportModel);
     BOOKS_QML_REGISTER(BooksPathModel);
     BOOKS_QML_REGISTER(BooksPageStack);
+    BOOKS_QML_REGISTER_SINGLETON(HarbourBattery);
     BOOKS_QML_REGISTER_SINGLETON(HarbourUtil);
     BOOKS_QML_REGISTER_SINGLETON(BooksHints);
     BOOKS_QML_REGISTER_SINGLETON(BooksUtil);
diff --git a/harbour-lib b/harbour-lib
index 323fc6b..6f745a0 160000
--- a/harbour-lib
+++ b/harbour-lib
@@ -1 +1 @@
-Subproject commit 323fc6b6c98f85265e55425c22d617991178cc44
+Subproject commit 6f745a05d05a236fa8053a4c2f40a807f83141ab