typedef struct _SYSTEM_POWER_STATUS 
{  
BYTE ACLineStatus;  
BYTE BatteryFlag;  
BYTE BatteryLifePercent;  
BYTE Reserved1;  
DWORD BatteryLifeTime;  
DWORD BatteryFullLifeTime;
} SYSTEM_POWER_STATUS, 
*LPSYSTEM_POWER_STATUS;

    SYSTEM_POWER_STATUS sysPower = {0};

    GetSystemPowerStatus(&sysPower);

【注意】本API只能读取一块电池电量的信息，对应Windows设备多块电池信息的读取，则需要另外的代码来读取。