diff --git a/app/src/main/res/drawable-hdpi/battery_0.png b/app/src/main/res/drawable-hdpi/battery_0.png
index c03f9fccec681482cdf9b477d4b02fba975ea4ca..c1bc1e661db06dca60a1bfa56459b1341bcc1a7d 100644
Binary files a/app/src/main/res/drawable-hdpi/battery_0.png and b/app/src/main/res/drawable-hdpi/battery_0.png differ
diff --git a/app/src/main/res/drawable-hdpi/battery_100.png b/app/src/main/res/drawable-hdpi/battery_100.png
index 4696e4ca4ef01f97b10ca8400fa1055cbf749763..6f76257ee2f3faa17e9133b74644a21e205e7a7b 100644
Binary files a/app/src/main/res/drawable-hdpi/battery_100.png and b/app/src/main/res/drawable-hdpi/battery_100.png differ
diff --git a/app/src/main/res/drawable-hdpi/battery_25.png b/app/src/main/res/drawable-hdpi/battery_25.png
index 29e58b8ef43d4f5d2961ff48a91f194fced4b15a..ea92908aff0ce281fd9bc844ac1005f389954071 100644
Binary files a/app/src/main/res/drawable-hdpi/battery_25.png and b/app/src/main/res/drawable-hdpi/battery_25.png differ
diff --git a/app/src/main/res/drawable-hdpi/battery_50.png b/app/src/main/res/drawable-hdpi/battery_50.png
index fb1d2dbbedfb5839dbe6aea45570a8c5fa56c662..691875ac35fe3a599785ad4b138ddae5788d9e79 100644
Binary files a/app/src/main/res/drawable-hdpi/battery_50.png and b/app/src/main/res/drawable-hdpi/battery_50.png differ
diff --git a/app/src/main/res/drawable-hdpi/battery_75.png b/app/src/main/res/drawable-hdpi/battery_75.png
index baee371248786c07a01a03fd565bd8ac4368d4f5..b118fc431c19d8edde4b0a254a218c1718d33847 100644
Binary files a/app/src/main/res/drawable-hdpi/battery_75.png and b/app/src/main/res/drawable-hdpi/battery_75.png differ
diff --git a/app/src/main/res/drawable-hdpi/battery_unknown.png b/app/src/main/res/drawable-hdpi/battery_unknown.png
new file mode 100644
index 0000000000000000000000000000000000000000..b5eb90f1dc573cd34e7a1cebc036b47c56677d8a
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/battery_unknown.png differ
diff --git a/app/src/main/res/drawable-mdpi/battery_0.png b/app/src/main/res/drawable-mdpi/battery_0.png
index 8efcad3ec8062a2221c81af9a39033120aab1185..b75d354afde7ab209622e5ec3c864a5973e1add7 100644
Binary files a/app/src/main/res/drawable-mdpi/battery_0.png and b/app/src/main/res/drawable-mdpi/battery_0.png differ
diff --git a/app/src/main/res/drawable-mdpi/battery_100.png b/app/src/main/res/drawable-mdpi/battery_100.png
index 241b0982c7f2212253472bcf913be0c6a9c485c7..8d54af3c89b52434f2d4e8d216338a56c9a1f9b5 100644
Binary files a/app/src/main/res/drawable-mdpi/battery_100.png and b/app/src/main/res/drawable-mdpi/battery_100.png differ
diff --git a/app/src/main/res/drawable-mdpi/battery_25.png b/app/src/main/res/drawable-mdpi/battery_25.png
index 0462de0f6996be5b26384051c02f6c53020d64fd..86347a621bb7cee942aab6bed8854f4ff0e397fd 100644
Binary files a/app/src/main/res/drawable-mdpi/battery_25.png and b/app/src/main/res/drawable-mdpi/battery_25.png differ
diff --git a/app/src/main/res/drawable-mdpi/battery_50.png b/app/src/main/res/drawable-mdpi/battery_50.png
index 0ed9e8218ac467d4f836891dfb7e80a8ddb01ede..7668c659db0ace4ec891e5badf9a00d3ac61fb72 100644
Binary files a/app/src/main/res/drawable-mdpi/battery_50.png and b/app/src/main/res/drawable-mdpi/battery_50.png differ
diff --git a/app/src/main/res/drawable-mdpi/battery_75.png b/app/src/main/res/drawable-mdpi/battery_75.png
index 345e8c351a26adb4e3b057f0afe0061a9b80592f..d928b5c1c26fbd620e8fd10090a65b82d4778e06 100644
Binary files a/app/src/main/res/drawable-mdpi/battery_75.png and b/app/src/main/res/drawable-mdpi/battery_75.png differ
diff --git a/app/src/main/res/drawable-mdpi/battery_unknown.png b/app/src/main/res/drawable-mdpi/battery_unknown.png
new file mode 100644
index 0000000000000000000000000000000000000000..8bc91464617a716f8fa5f9aa19a79c214644b324
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/battery_unknown.png differ
diff --git a/app/src/main/res/drawable-xhdpi/battery_0.png b/app/src/main/res/drawable-xhdpi/battery_0.png
index c512402c0624482b93a1b1c5cae165664c4f3a7a..2c552d7aaf30fd5235aab8551e1e831b1caa4f98 100644
Binary files a/app/src/main/res/drawable-xhdpi/battery_0.png and b/app/src/main/res/drawable-xhdpi/battery_0.png differ
diff --git a/app/src/main/res/drawable-xhdpi/battery_100.png b/app/src/main/res/drawable-xhdpi/battery_100.png
index a1e82cb76c7215cb4fa4e72468b18611ec2126bb..ca9172be7ace10190853e0d6b460e3bf034c38a5 100644
Binary files a/app/src/main/res/drawable-xhdpi/battery_100.png and b/app/src/main/res/drawable-xhdpi/battery_100.png differ
diff --git a/app/src/main/res/drawable-xhdpi/battery_25.png b/app/src/main/res/drawable-xhdpi/battery_25.png
index c10647838f93966506685d6f5fa14be1a26a36a8..2bfce679ddb28ee2da3bf13763ca82965fec2bb5 100644
Binary files a/app/src/main/res/drawable-xhdpi/battery_25.png and b/app/src/main/res/drawable-xhdpi/battery_25.png differ
diff --git a/app/src/main/res/drawable-xhdpi/battery_50.png b/app/src/main/res/drawable-xhdpi/battery_50.png
index b689f641c47fcee2cfd122f8e2c05398ec89e101..6e0d3b3186fdfad8e1aaadf1bb95e0d2c523bd95 100644
Binary files a/app/src/main/res/drawable-xhdpi/battery_50.png and b/app/src/main/res/drawable-xhdpi/battery_50.png differ
diff --git a/app/src/main/res/drawable-xhdpi/battery_75.png b/app/src/main/res/drawable-xhdpi/battery_75.png
index 2f8843b1a0695d85c1da674137ee90b576cd3cc1..3cf8966e9f7d08719dee7a8c6febd2ce3557802d 100644
Binary files a/app/src/main/res/drawable-xhdpi/battery_75.png and b/app/src/main/res/drawable-xhdpi/battery_75.png differ
diff --git a/app/src/main/res/drawable-xhdpi/battery_unknown.png b/app/src/main/res/drawable-xhdpi/battery_unknown.png
new file mode 100644
index 0000000000000000000000000000000000000000..368a8527f8736ae47b26f61fb7bb0d27dde17c39
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/battery_unknown.png differ
diff --git a/app/src/main/res/drawable/battery_0.png b/app/src/main/res/drawable/battery_0.png
index 16377a564141df832f1bbe472c42ab450173e2a5..03c55826d4bab007dafd9ff69e4a30738e78f9ab 100644
Binary files a/app/src/main/res/drawable/battery_0.png and b/app/src/main/res/drawable/battery_0.png differ
diff --git a/app/src/main/res/drawable/battery_100.png b/app/src/main/res/drawable/battery_100.png
index c8bbc2397dfe7ee2b820b1da644276b9ffbb9cd2..3447a8f32435312acd6c002214716e14c41a62a3 100644
Binary files a/app/src/main/res/drawable/battery_100.png and b/app/src/main/res/drawable/battery_100.png differ
diff --git a/app/src/main/res/drawable/battery_25.png b/app/src/main/res/drawable/battery_25.png
index 92de235a7724a7563dee6021a2822350457dbf0e..1b8e10542a6b0c132f7ff4eb918bc2cef68043e1 100644
Binary files a/app/src/main/res/drawable/battery_25.png and b/app/src/main/res/drawable/battery_25.png differ
diff --git a/app/src/main/res/drawable/battery_50.png b/app/src/main/res/drawable/battery_50.png
index fb037d0011c8cf75f73a0349d8c8e82cb4d613b9..d516ea0cfe6949fa3b0d518a4a65d846f7337294 100644
Binary files a/app/src/main/res/drawable/battery_50.png and b/app/src/main/res/drawable/battery_50.png differ
diff --git a/app/src/main/res/drawable/battery_75.png b/app/src/main/res/drawable/battery_75.png
index f3898daa77f4d66f34cfc452e3f6fb640b537c24..d2e1ac09daee07c0b0493fcb7ab765798ebba524 100644
Binary files a/app/src/main/res/drawable/battery_75.png and b/app/src/main/res/drawable/battery_75.png differ
diff --git a/app/src/main/res/drawable/battery_unknown.png b/app/src/main/res/drawable/battery_unknown.png
new file mode 100644
index 0000000000000000000000000000000000000000..4c8036c84d3e64b4c6ce5e75c4fb18a00367489c
Binary files /dev/null and b/app/src/main/res/drawable/battery_unknown.png differ
diff --git a/app/src/main/res/menu/menu.xml b/app/src/main/res/menu/menu.xml
index 04088a880bf29ac40b795fff5b38fcbd175894a2..a1da6693ab352108fe3a1f7a42105a3d839f00dd 100644
--- a/app/src/main/res/menu/menu.xml
+++ b/app/src/main/res/menu/menu.xml
@@ -2,6 +2,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
+    <!-- battery icons by Oxygen Team http://www.oxygen-icons.org -->
     <item
         android:id="@+id/status_battery"
         android:icon="@drawable/battery_unknown"