If your battery is too old, you can wrap your battery with a newspaper and then put it in your fridge for several days, and then get it out and try to charge it fully, and then use it until it's dead. repeat the procesure 2 or 3 times. This way can revive your old battery. I heard it somewhere.
Or, another easy way is to change you
dell battery or adapter. You just borrow someone's battery and adapter to try.