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Possible Duplicate:
iphone: Calculating battery life

I have seen many apps in appstore which provides Estimated battery work time for different usage patterns (standby, audio and video playback, Wi-Fi and 3G browser usage, talk time). I have a similar requirement to compute the estimated time like this. Can someone throw some light on how to do this programmatically?

Community
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user1425958
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1 Answers1

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The battery life specs come from Apple's site.

  • Talk time: Up to 8 hours on 3G, up to 14 hours on 2G (GSM)
  • Standby time: Up to 200 hours
  • Internet use: Up to 6 hours on 3G, up to 9 hours on Wi-Fi
  • Video playback: Up to 10 hours
  • Audio playback: Up to 40 hours

The code to get the percentage of battery left is:

[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];
float batteryLevel = [myDevice batteryLevel];

That's all Apple and the iOS give you, so anything else an app uses is guesswork.

woz
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