What happens if the Raid card battery goes dead?

I just got my MacPro, Raid card, and 3 SAS drive. I set it up as Raid 0. The battery in the Raid card is good for 72 hrs. And that is to save the raid cache. So what happens if I leave the MacPro unplugged for longer then 3 days and the battery goes dead? Do I loose all my data?
Thanks-Ray

With an orderly shutdown prior to disconnecting the power, no problems should arise.

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So i just want the employee to receive notification that it got rejected and the system should not force him to submit the rejected time card.
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From what I suspect reading the case, the battery is a 3.7 V Lithium battery, probably with built-in electronics that I can perhaps get for $5 from China. Any soldering work is not a problem. If I can replace the digitizer of an iPad mini, I can probably replace a battery too.
The case of the battery looks like a regular aluminum box and the lit is probably just glued onto the battery. It's seems quite sturdy and would require some force to open. Has anyone ever opened an Apple Raid Card battery? I'm reluctant to apply much heat to open the case, though external heat might be ok. Any ideas? I'm aware of the risks.

To summarise the 'end of days' issue with RAID5 the problem is that with the much bigger size of hard disks now available and being used e.g. 4TB or even bigger, it takes so long to rebuild a RAID5 array when replacing a faulty drive that the chance of another drive failing during the rebuild is becoming more and more likely. This is actually made worse by the fact that a RAID rebuild causes a lot of activity and therefore 'stress' on the hard disks in order to do the rebuild process. It can take more than 24 hours to do a complete RAID5 rebuild and during all that time you are vulnerable to a complete failure.
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Apple Raid Card Battery Failed

Hey guys !
I have an early 2008 Mac Pro with a Raid Card and i get this message battery failure other than expired
actually i got this message again about an year or so back ... so yes it happened before ... Apple replaced my battery
Now im out of warranty coverage.
Questions are :
How does this affect my Raid Set ?
Can my Raid Set survive without the battery ?
If yes ... what are the downsides ?
What can i do to manage the situation without changing again the battery ?
Hope to get some advice soon on this matter
Thank you very much.
PS
Down below i pasted some specs for my machine
Mac Pro RAID Card:
PCI Slot:          Slot-4
Hardware Version:          1.00
Firmware Version:          M-2.0.5.5
Expansion ROM Version:          0018
Shutdown Status:          Normal shutdown
Write Cache Enabled:          No
Battery Info:
Firmware Revision:          1.0.2
First Installed:          1/1/01 2:16 AM
Last Date Conditioned:          2/24/12 3:47 PM
State:          Faulted Battery
Fault:          Battery failed (other than expired)
Status:
Charging:          No
Conditioning:          No
Connected:          Yes
Discharging:          No
Sufficient Charge:          No
Drives:
Bay 1:
Product ID:          ST3300655SS
Serial Number:          3LM35BGK00009827PBXY
Firmware Revision:          A005
Type:          SAS
SMART Status:          Unsupported
Capacity:          300 GB (299,999,999,488 bytes)
RAID Sets:          RS1
Status:
Assigned:          Yes
Failed:          No
Foreign:          No
Missing:          No
Reliable:          Yes
Roaming:          No
Spare:          No
Bay 2:
Product ID:          ST3300655SS
Serial Number:          3LM622YT00009923HP5Q
Firmware Revision:          A005
Type:          SAS
SMART Status:          Unsupported
Capacity:          300 GB (299,999,999,488 bytes)
RAID Sets:          RS1
Status:
Assigned:          Yes
Failed:          No
Foreign:          No
Missing:          No
Reliable:          Yes
Roaming:          No
Spare:          No
Bay 3:
Product ID:          ST3300655SS
Serial Number:          3LM2Y49T00009827PAZV
Firmware Revision:          A005
Type:          SAS
SMART Status:          Unsupported
Capacity:          300 GB (299,999,999,488 bytes)
RAID Sets:          R0-3
Status:
Assigned:          Yes
Failed:          No
Foreign:          No
Missing:          No
Reliable:          Yes
Roaming:          No
Spare:          No
RAID Sets:
R0-3:
RAID Level:          Enhanced JBOD
Capacity:          299.8 GB (299,798,364,160 bytes)
Available Capacity:          Zero KB
Drives:          Bay 3
Volumes:          Vol-R0-3
Status:          Viable (Good)
RS1:
RAID Level:          0
Capacity:          599.73 GB (599,730,946,048 bytes)
Available Capacity:          Zero KB
Drives:          Bay 1, Bay 2
Volumes:          R1V1
Status:          Viable (Good)
Volumes:
R1V1:
BSD Name:          disk1
Capacity:          599.73 GB (599,730,946,048 bytes)
Read Command Size:          2 MB
Read Ahead Margin:          16 MB
RAID Set:          RS1
Status:
Degraded:          No
Inited:          Yes
In Transition:          No
Viable:          Yes
Vol-R0-3:
BSD Name:          disk2
Capacity:          299.8 GB (299,798,364,160 bytes)
Read Command Size:          2 MB
Read Ahead Margin:          16 MB
RAID Set:          R0-3
Status:
Degraded:          No
Inited:          Yes
In Transition:          No
Viable:          Yes
Hardware Overview:
Model Name:          Mac Pro
Model Identifier:          MacPro3,1
Processor Name:          Quad-Core Intel Xeon
Processor Speed:          3.2 GHz
Number Of Processors:          2
Total Number Of Cores:          8
L2 Cache (per processor):          12 MB
Memory:          8 GB
Bus Speed:          1.6 GHz
Boot ROM Version:          MP31.006C.B05

The RAID card battery backs up the memory buffers on the card. These are needed for calculating the checksum blocks used in RAID 5 and similar schemes.
If you are not running RAID 5 or similar, you do not need the battery. For that matter, you do not need the RAID card, either (unless you are running SAS drives).

Apple RAID Card - Battery failed (code 0x#0 = 18)

Hello,
Upon start up of the computer I get a message that says "The Apple RAID Card installed in your system requires your attention".
When I open up the RAID Utility I have messages like -
Battery failed (code 0x#0 = 18)
Write cache disabled due to insufficient Battery Charge
Can anyone explain what this means and what I should now do?
Do I need a new Battery and does this mean my RAID 5 isn't saving data correctly?
Thanks in advance for any assistance.
Kris

Hello
I have the same problem too:
Battery failed (code 0x#0 = 18)
or in my case, I am german: Die Batterie funktioniert nicht (Code 0x#0 = 18)
It happened the first time after one year and I replaced the battery. One year later it happened again and I replaced the battery. And one more year later again. This time I decided not to replace the battery.
I booted the system from the recovery media and started the the raid utility from there and it said: battery charging.
So I returned to my "normal" partition and it said: battery charging.
A few days later: Battery failed (code 0x#0 = 18)
I repeaded this several times, always with the same result.
I was quite sure that all the trouble resulted from a firmware bug.
So I did shut down my Mac, and removed my raid card. On the raid card I disconnected the battery and waited a few minutes and reconnected it. I reassembled all and started my Mac.
It is running now for more than a month without any further errors.

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