How to read battery case status from the iphone?

Question

Possible Duplicate:
How to get battery status?

I am implementing one iPhone application in which i want to read battery status of the iPhone by programming. I dont know is it possible or not. Please give me advice for that.

Answer 1

To read battery level and status you just have to:

float battLvl = [[UIDevice currentDevice] batteryLevel]; // range is from 0.0 to 1.0
UIDeviceBatteryState battState = [UIDevice currentDevice] batteryStatus];

To monitor battery level and status you can do the following:

// enable monitoring and add observers with selector
UIDevice *device = [UIDevice currentDevice];
device.batteryMonitoringEnabled = YES;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(batteryChanged:) name:@"UIDeviceBatteryLevelDidChangeNotification" object:device];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(batteryChanged:) name:@"UIDeviceBatteryStateDidChangeNotification" object:device];

// Your notification handler
- (void)batteryChanged:(NSNotification *)notification
{
    UIDevice *device = [UIDevice currentDevice];
    NSLog(@"state: %i | charge: %f", device.batteryState, device.batteryLevel);
}

Answer 2

Following lines of code will be helpful:

[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

[[UIDevice currentDevice] batteryLevel];
[[UIDevice currentDevice] batteryState];

For detail, refer THIS link. It will elaborate you.