A laptop battery provides power to the laptop when it is not connected to an external power source. Over time, all laptop batteries will eventually die and need to be replaced. There are a few ways to check if your laptop battery is dead.
One way to check if your laptop battery is dead is to look at the battery icon in the taskbar. If the battery icon has a red X through it, this means that the battery is dead and needs to be replaced. You can also check the battery status in the BIOS. To do this, restart your laptop and press the F2 key (or whatever key is necessary to enter the BIOS on your particular laptop model) when the manufacturer’s logo appears. Once you are in the BIOS, look for the battery status section. This section will tell you the current battery level and whether or not the battery is charging.