One common failing on the 5300 machines is a weak power jack - it's too small and snaps/breaks off the motherboard within time. Jiggle this around/hold the charging pin firmly in position and see if you get more life that way.

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I'll try that tomorrow. Feeling a little under the weather doesn't exactly help either. I'm hoping it's nothing to serious, but this computer is in amazing condition, better then my 5300cs and the c has a better display. I'm also still trying to get that darn Cube to work.