small tweaks

src/utils.js

@@ -1,25 +1,21 @@
 export function toTime (sec) {
   sec = parseInt(sec, 10)
-  var hours = Math.floor(sec / 3600)
-  var minutes = Math.floor((sec - hours * 3600) / 60)
-  var seconds = sec - hours * 3600 - minutes * 60
+  let hours = Math.floor(sec / 3600)
+  let minutes = Math.floor((sec - hours * 3600) / 60)
   if (hours < 10) {
     hours = '0' + hours
   }
   if (minutes < 10) {
     minutes = '0' + minutes
   }
-  if (seconds < 10) {
-    seconds = '0' + seconds
-  }
   return hours + ':' + minutes
 }
 
 export function batteryStats (battery) {
   const percentage = parseFloat((battery.level * 100).toFixed(2)) + '%'
+  const charging = battery.charging
   let fully
   let remaining
-  let charging = battery.charging
 
   if (charging && battery.chargingTime === Infinity) {
     fully = 'Calculating...'