Get iOS Battery Info and Temperature

BatteryInfo.m

/*
Note: Requires systemgroup.com.apple.powerlog entitlement in order to work.
*/

// get a dictionary of the battery info
NSDictionary* getBatteryInfo()
{
    CFDictionaryRef matching = IOServiceMatching("IOPMPowerSource");
    io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault, matching);
    CFMutableDictionaryRef prop = NULL;
    IORegistryEntryCreateCFProperties(service, &prop, NULL, 0);
    NSDictionary* dict = (__bridge_transfer NSDictionary*) prop;
    IOObjectRelease(service);
    return dict;
}

// getting properties
// many of the properties can be found in this header:
// https://opensource.apple.com/source/xnu/xnu-2422.100.13/iokit/IOKit/pwr_mgt/IOPM.h.auto.html

/*
Below are some examples:
*/
// Battery Temperature
double temp = [batteryInfo[@"Temperature"] doubleValue] / 100.0; // needs to be divided by 100, as the value drops the decimal
// Charger Wattage
int watts = [batteryInfo[@"AdapterDetails"][@"Watts"] longLongValue];
// Charger Current
double current = [batteryInfo[@"AdapterDetails"][@"Current"] doubleValue];
// Device Amperage (off of charger)
double amps = [batteryInfo[@"Amperage"] doubleValue];