Should I do this? How would it affect the battery voltage issue?
I'm not opposed to getting a new battery, I'm just curious about the suggestion that the screen offers to me, which presumably might be helpful (and perhaps simpler and cheaper than new battery installation).
I don't think it will do anything to the battery voltage.
As Chub_tor says it will enable you to enter BIOS and set time/date etc. At the moment your battery is so low BIOS is losing that data and wants you to reset it. Once you have replaced the battery, you will get that message one more time. Reset the data and that's it.
Before you change the battery it can be a good idea to go into BIOS and make a note of the various settings (HDDs, Graphics etc). This will enable you to see any difference after the battery change
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