Follow these steps to troubleshoot and fix a damaged laptop battery:

1. Check power settings: Is the laptop in power-saving mode? Is the battery being properly charged?
2. Reset the laptop’s power plan: Adjust the power settings to best suit your needs.
3. Replace the damaged battery: Consult a certified technician or laptop manufacturer for instructions on replacing the battery.
4. Test the laptop power system: Run diagnostic tests to make sure all components of the laptop’s power system are in working order.