12-29-2014 08:42 AM
02-10-2015 12:53 AM
Welcome to Lenovo Community!
As per the query we understood that you are facing issue with battery not detected in your Lenovo N100 laptop.
Please boot the system to the safe mode and check for the issue.
Also try to uninstall the Microsoft ACPI and restart the system and check for the issue.
Hope this helps. Do post back if issue persists!