SPA10 battery and BIOS time lost problems

We have 7 SPA10 laptops in our University department.
They are all showing the same problem when they haven't been used for a week or so.
The error message is:
RTC battery is low or CMOS checksum is inconsistent.
Press F1 key to set Date/Time
They didn't use to do this so is there an RTC battery we can change or anyone know another solution?
Our SPA60s don't show this problem.
Cheers
Paul

Hi
I'd like to give you some more info regarding this question.
Most Toshiba notebooks are equipped with a rechargable RTC battery. If they are left alone for some time, the RTC battery will discharge and You will get this error message when booting up the first time.
This is not the end of the world since the only actual problem is that time and date is lost.
The rest of the BIOS settings are set to factory default which in almost 100% are absolutely perfect.
If not, they are easily changed from within Windows via HWSETUP found in the Control Panel (icon looks like a wrench-tool).
It is as easy to recharge the RTC battery! Plug the computer in the the DC and start it up. After it has been running (turned on) for about 24 hours, the RTC battery should be 100% recharged.
Good luck
Tom

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Peace
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