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Most charging circuits in laptops are almost the same and switches off charging after the battery is full, but there might be a few which are different and would require a different approach.

She said..just take off the battery and continously plug it in while in use. U need to keep saving your work in case the socket become loose and your work won't be saved. Or better not let anyone touch your socket as it wont be saved as with no battery.

I bought a Inspiron mini. It worked very fine for what I needed. I think that one time I left it plug it for a whole day. Its duratiion has been reducing since then. Now it lasts about ten minutes.