Battery removal to bypass cartridge expiry

What are the steps to remove the internal battery in a HP Officejet Pro


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mjcap how do your figure it has one? It is my understanding that there are no more batteries for the CMOS. Those were repalced with capacitors and this bypass will not work on your printer


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mj. below is a link to show how to access the cmos battery on the HP Office jet Pro 8600, hopefully it will be similar enough to your model 7500 to be of help. Good luck.

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mjcap will be eternally grateful.
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