Replacing CMOS battery On a ROM 3 IIgs @mspysu79

Replacing CMOS battery On a ROM 3 IIgs @mspysu79

Uploaded February 2015 | Updated September 2026, 2 weeks ago

After getting a replacement 1/2 AA Lithium battery cheap at a crossing Radio Shack, I decided to replace the dead CMOS battery.

Replacing CMOS battery On a ROM 3 IIgs

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Replacing CMOS battery On a ROM 3 IIgs