title: Updating Live tile using background agent
body: <p>I am looking into ways of updating a live tile frequently - for example every 5 minutes.</p>
  
  <p>I have used Push notifcations before, but I want to avoid them this time.</p>
  
  <p>ShellTileShedule only updates once an hour.</p>
  
  <p>I am thinking about using a background agent that runs every five minutes and updates the tile with the information it has obtained from the server.</p>
  
  <p>Apart from the 14day expiry, can you see any pitfalls with this?</p>
  
  <p>How do people normally get round the 14day expiry?</p>
  
  <p>Will querying a service and downloading a few lines of text every 5 mins really kill the battery?</p>
  
  <p>EDIT: It seems background agents for a task such as this only update every 30mins, is there a way round this, or a better solution?</p>
  
  <p>Thanks.</p>