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Most of the batteries I have see in computers are the 2032 small flat batteries. They are not rechargeable, but the motherboard does not draw power from them when on. Most of those batteries only last 6 or 7 years if you turn off the computer when not using it.
It takes very little "juice" to keep the BOIS active. Most folks replace the computer before that battery ever has a problem. Computers age faster than dogs. So a 10 year old computer is really old and slow and get replaced.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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