Battery Wall Charger

Battery Wall Charger
Laptop Battery dying, still works if I plug in the wall charger?

I have a Dell Inspiron 1525 and my laptop has become a know that my battery is in need of replacement, currently the team remains in close after a few minutes off the charger, now I keep it connected to the wall and stays on. I will not be able to get a new battter until a week from now and want to make sure that it will be able to use my computer while is plugged into the wall. If you plug in the wall that is not right to use electricity battery power? Sry do not know anything about computers. Thanks!

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