What is the replacement battery-dell diminsion-cpu

pneedham_01

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Jan 23, 2012
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I have a 10 year old 3000 and have to reset the date and time frequently. Whatb is the replacement battery? What's the proceedure? Is there a cheap way to upgrade the processor. Would a celeron D or a Core Duo work without to much other upgrading like cooling or Bios?