title: Can I check the remaining battery of Beacon?
body: <p>I already checked the specification of below beacons:</p>
  
  <ul>
  <li><a href="https://github.com/google/eddystone/blob/master/protocol-specification.md" rel="nofollow noreferrer">Eddystone Protocol Specification</a></li>
  <li><a href="https://github.com/AltBeacon/spec" rel="nofollow noreferrer">AltBeacon Protocol Specification v1.0</a></li>
  <li><a href="https://stackoverflow.com/questions/18906988/what-is-the-ibeacon-bluetooth-profile/19040616#19040616">ibeacon Payload</a></li>
  </ul>
  
  <p>AFAIK, we can not get the remaining battery of Beacon by advertising.
  For example, I can not check that my Estimote eddystone that use "Panasonic CR2450 battery" have 50% of battery.</p>
  
  <p>Is it true?
  If not, how can I get this information?</p>