daisy: use `power_usage` module

apps/daisy/ChangeLog

@@ -11,3 +11,4 @@
 0.11: Minor code improvements
 0.12: Added setting to change Battery estimate to hours
 0.13: Fixed Battery estimate Default to percentage and improved setting string
+0.14: Use `power_usage` module

apps/daisy/app.js

@@ -116,7 +116,7 @@ function updateSunRiseSunSet(now, lat, lon, line){
 function batteryString(){
   let stringToInsert;
   if (settings.batt_hours) {
-    var batt_usage = 200000/E.getPowerUsage().total;
+    var batt_usage = require("power_usage").get().hrsLeft;
     let rounded;
     if (batt_usage > 24) {
       var days = Math.floor(batt_usage/24);

apps/daisy/metadata.json

@@ -1,6 +1,6 @@
 { "id": "daisy",
   "name": "Daisy",
-  "version": "0.13",
+  "version": "0.14",
   "dependencies": {"mylocation":"app"},
   "description": "A beautiful digital clock with large ring guage, idle timer and a cyclic information line that includes, day, date, steps, battery, sunrise and sunset times",
   "icon": "app.png",