Negative value of Current Drawn, why?

Question

RAID

Checking the raid arrays in the morning, I noticed a negative value.

Controllers found: 1
----------------------------------------------------------------------
Controller information
----------------------------------------------------------------------
   Controller Status                        : Optimal
   Controller Mode                          : Default/RAID
   Channel description                      : SAS/SATA
   Controller Model                         : Adaptec ASR7805
   Controller Serial Number                 : 3A0613064F7
   Physical Slot                            : 4
   Temperature                              : 64 C/ 147 F (Normal)
   Installed memory                         : 1024 MB
   Copyback                                 : Disabled
   Background consistency check             : Disabled
   Automatic Failover                       : Enabled
   Global task priority                     : High
   Performance Mode                         : Default/Dynamic
   Stayawake period                         : Disabled
   Spinup limit internal drives             : 0
   Spinup limit external drives             : 0
   Defunct disk drive count                 : 0
   Logical devices/Failed/Degraded          : 2/0/0
   NCQ status                               : Enabled
   Statistics data collection mode          : Disabled
   --------------------------------------------------------
   Controller Version Information
   --------------------------------------------------------
   BIOS                                     : 7.1-0 (30040)
   Firmware                                 : 7.1-0 (30040)
   Driver                                   : 1.2-1 (30300)
   Boot Flash                               : 7.1-0 (30040)

   --------------------------------------------------------
   Controller Cache Backup Unit Information
   --------------------------------------------------------

    Overall Backup Unit Status              : Ready

         Backup Unit Type                   : AFM-700/700 LP
         Non-Volatile Storage Status        : Ready
         Supercap Status                    : Ready

         -----------------------------------
         Supercap Information               
         -----------------------------------
         Current Temperature                : 33 deg C
         Threshold Temperature              : 51 deg C
         Life-time Temperature Recorded     
         (Min/Max)                          : 6494 deg C/ 48 deg C

         Voltage(Present/Max)               : 4944 mV/ 5302 mV
         Life-time Max Voltage Recorded     : 9906 mV

         Current Drawn(Present/Max)         : -11 mA/ 560 mA
         Health                             : 94 percent

Interested in a negative value: Current Drawn(Present/Max) : -11 mA/ 560 mA
Can this be at all?