① Check the battery hardware: First, try to check whether the battery hardware is loose or damaged. If the battery looks normal, you can try to reinstall the battery to ensure that the battery and the computer are connected well.
② Update BIOS and drivers: Make sure that your computer BIOS and drivers are the latest version. Sometimes, these problems may be caused by outdated BIOS or drivers. You can find relevant updates in Lenovo official website.
③ Lenovo battery management software: You can try to use the battery management software provided by Lenovo, such as "Lenovo Power Management", to detect the battery status and optimize the battery use.
④ Reset the computer: You can try to restore the computer to the factory settings to see if you can solve the problem. Please make sure to back up important data before recovery.
⑤ Contact after-sales service: If the above methods can't solve the problem, I suggest you contact Lenovo after-sales service to ask if it is necessary to replace the battery. According to the health condition of the battery you described, the battery may have been damaged and needs to be replaced. Before contacting the after-sales, you can find out the price and process of battery replacement.
Please note that during the operation, please follow the safety guidelines to avoid damaging the computer or hurting yourself. I hope your computer battery problem can be solved as soon as possible!