Latitude X200 needs new CMOS battery

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This battery recharges from the main system battery, so be sure that is working.

Hi and thank, How long does this CMOS battery stay charged? I am used to not having the laptop powered for a month or so and when I do it has the date and time all changed and incorrect. I have to almost everytime I boot up change these to the current date and time. Is this normal?

Thanks,

John

If the main battery has a charge, the CMOS battery should run indefinitely.  If the main battery is dead, and you unplug the power, the CMOS battery will quickly go dead in less than a month.