Tweak upower daemon battery thresholds

This reverts commit 7d23e7f63a16d0001661932807f1c7604391dfb7.

modules/power.nix

@@ -32,14 +32,16 @@
       TPACPI_ENABLE = 1;
       TPSMAPI_ENABLE = 1;
 
-      # Disable touchscreen to save battery
+      # Disable bluetooth on startup
-      RUNTIME_PM_DRIVER_BLACKLIST = "usbhid";
+      DEVICES_TO_DISABLE_ON_STARTUP = "bluetooth";
     };
   };
 
   # Suspend to RAM/disk when battery is critical
   services.upower = {
     enable = true;
-    percentageAction = 5;
+    percentageLow = 15;
+    percentageCritical = 10;
+    percentageAction = 7;
   };
 }