Laptop batteries, will slowly stop holding their charge. Eventually they'll need to be replaced, though it often takes years for them to reach this state. If your battery has reached this level, you can check and see what kind of battery you need depending on your laptop. One word of caution: It's always recommended to replace your battery with one from the company that made your laptop.
Where can I find battery models and what they look like?
The battery name is always on...
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