diff --git a/reactos/drivers/bus/acpi/cmbatt/cmexec.c b/reactos/drivers/bus/acpi/cmbatt/cmexec.c
index a41865c5e4c..7fb4ea591bf 100644
--- a/reactos/drivers/bus/acpi/cmbatt/cmexec.c
+++ b/reactos/drivers/bus/acpi/cmbatt/cmexec.c
@@ -9,25 +9,73 @@
 /* INCLUDES *******************************************************************/
 
 #include "cmbatt.h"
+#include "ntstatus.h"
 
 /* FUNCTIONS ******************************************************************/
 
 NTSTATUS
 NTAPI
-GetDwordElement(PACPI_METHOD_ARGUMENT Argument,
-                PULONG Value)
+GetDwordElement(IN PACPI_METHOD_ARGUMENT Argument,
+                OUT PULONG Value)
 {
-    UNIMPLEMENTED;
-    return STATUS_NOT_IMPLEMENTED;
+    NTSTATUS Status;
+    
+    /* Must have an integer */
+    if (Argument->Type != ACPI_METHOD_ARGUMENT_INTEGER)
+    {
+        /* Not an integer, fail */
+        Status = STATUS_ACPI_INVALID_DATA;
+        if (CmBattDebug & 0x4C)
+            DbgPrint("GetDwordElement: Object contained wrong data type - %d\n",
+                     Argument->Type);
+    }
+    else
+    {
+        /* Read the integer value */
+        *Value = Argument->Argument;
+        Status = STATUS_SUCCESS;
+    }
+    
+    /* Return status */
+    return Status;
 }
 
 NTSTATUS
 NTAPI
-GetStringElement(PACPI_METHOD_ARGUMENT Argument,
-                 PCHAR Value)
+GetStringElement(IN PACPI_METHOD_ARGUMENT Argument,
+                 OUT PCHAR Value)
 {
-    UNIMPLEMENTED;
-    return STATUS_NOT_IMPLEMENTED;
+    NTSTATUS Status;
+    
+    /* Must have a string of buffer */
+    if ((Argument->Type == ACPI_METHOD_ARGUMENT_STRING) ||
+        (Argument->Type == ACPI_METHOD_ARGUMENT_BUFFER))
+    {
+        /* String must be less than 256 characters */
+        if (Argument->DataLength < 256)
+        {
+            /* Copy the buffer */
+            RtlCopyMemory(Value, Argument->Data, Argument->DataLength);
+            Status = STATUS_SUCCESS;
+        }
+        else
+        {
+            /* The buffer is too small (the string is too large) */
+            Status = STATUS_BUFFER_TOO_SMALL;
+            if (CmBattDebug & 0x4C)
+                DbgPrint("GetStringElement: return buffer not big enough - %d\n", Argument->DataLength);
+        }
+    }
+    else
+    {
+        /* Not valid string data */
+        Status = STATUS_ACPI_INVALID_DATA;
+        if (CmBattDebug & 0x4C)
+            DbgPrint("GetStringElement: Object contained wrong data type - %d\n", Argument->Type);
+    }
+    
+    /* Return the status */
+    return Status;
 }
 
 NTSTATUS
@@ -86,15 +134,72 @@ CmBattSetTripPpoint(PCMBATT_DEVICE_EXTENSION DeviceExtension,
 
 NTSTATUS
 NTAPI
-CmBattSendDownStreamIrp(PDEVICE_OBJECT DeviceObject,
-                        ULONG IoControlCode,
-                        PVOID InputBuffer,
-                        ULONG InputBufferLength,
-                        PACPI_EVAL_OUTPUT_BUFFER OutputBuffer,
-                        ULONG OutputBufferLength)
+CmBattSendDownStreamIrp(IN PDEVICE_OBJECT DeviceObject,
+                        IN ULONG IoControlCode,
+                        IN PVOID InputBuffer,
+                        IN ULONG InputBufferLength,
+                        IN PACPI_EVAL_OUTPUT_BUFFER OutputBuffer,
+                        IN ULONG OutputBufferLength)
 {
-    UNIMPLEMENTED;
-    return STATUS_NOT_IMPLEMENTED;
+    PIRP Irp;
+    NTSTATUS Status;
+    KEVENT Event;
+    IO_STATUS_BLOCK IoStatusBlock;
+    PAGED_CODE();
+
+    /* Initialize our wait event */
+    KeInitializeEvent(&Event, SynchronizationEvent, 0);
+    
+    /* Allocate the IRP */
+    Irp = IoBuildDeviceIoControlRequest(IoControlCode,
+                                        DeviceObject,
+                                        InputBuffer,
+                                        InputBufferLength,
+                                        OutputBuffer,
+                                        OutputBufferLength,
+                                        0,
+                                        &Event,
+                                        &IoStatusBlock);
+    if (!Irp)
+    {
+        /* No IRP, fail */
+        if (CmBattDebug & 0x4C)
+            DbgPrint("CmBattSendDownStreamIrp: Failed to allocate Irp\n");
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+ 
+    /* Call ACPI */
+   if (CmBattDebug & 0x40)
+       DbgPrint("CmBattSendDownStreamIrp: Irp %x [Tid] %x\n", Irp, KeGetCurrentThread());
+    Status = IoCallDriver(DeviceObject, Irp);
+    if (Status == STATUS_PENDING)
+    {
+        /* Wait for completion */
+        KeWaitForSingleObject(&Event,
+                              Executive,
+                              KernelMode,
+                              FALSE,
+                              NULL);
+        Status = Irp->IoStatus.Status;
+    }
+    
+    /* Check if caller wanted output */
+    if (OutputBuffer)
+    {
+        /* Make sure it's valid ACPI output buffer */
+        if ((OutputBuffer->Signature != ACPI_EVAL_OUTPUT_BUFFER_SIGNATURE) ||
+            !(OutputBuffer->Count))
+        {
+            /* It isn't, so set failure code */
+            Status = STATUS_ACPI_INVALID_DATA;
+        }
+    }
+    
+    /* Return status */
+    if (CmBattDebug & 0x40)
+      DbgPrint("CmBattSendDownStreamIrp: Irp %x completed %x! [Tid] %x\n",
+               Irp, Status, KeGetCurrentThread());
+    return Status;
 }
      
 /* EOF */