I use a VaiO S computer from 2013 at home, and I plug the charger in most of the time. Lately I noticed that the battery icon in the taskbar shows an x mark, and it says battery 1 is "not available to use". If I unplug the charger, the computer doesn't boot. When I plug it in and use for a long time, sometimes the battery shows up again. How can I fix this, do I have to change the battery?
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