How to check the battery level of your iOS device?

June 23, 2012iOS Developmentbattery, UIDeviceJay Versluis

We can use the batteryLevel property of the UIDevice class for this. It will return a float:

float myFloat = [[UIDevice currentDevice] batteryLevel];

1	float myFloat = [[UIDevice currentDevice] batteryLevel];

If you’d like to print this in a UILabel you’ll have to convert it into a String Object like so:

self.myLabel.text = [NSString stringWithFormat:@"%f", myFloat];

1	self.myLabel.text = [NSString stringWithFormat:@"%f", myFloat];

For this to work battery monitoring needs to be enabled, perhaps in the viewDidLoad method. Otherwise the returned value will be -1.0:

[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

1	[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

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