My hp laptop 22mths old wont keep time. very time i switch it off it wakes with time it was switched off at? is it the cmos battery? no warranty.

It must be the cmos battery? Get the manual of your laptop and locate the battery. If it is easily accessible then swap for a new one. Contact HP if you are not sure!

Hi

Thank you for your query

From your description, indeed it does sound like the CMOS battery, however the vest way to check is next time you start the Laptop do the following

1)When loading the laptop there will be a message that says hit F12 or hit the del key etc etc to get into bios, press the appropriate key, if there is no such messgae try the keys F12, del or esc

once in Bios check the time if it is incorrect then it is the CMOS battery, if it isnt then it is windows related

However from what you are describing it does seem to be the CMOS battery

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