The Laptop battery pack may overheat due to a software configuration issue. If the battery pack overheats, there is a risk of potentially causing and leading to a fire hazard.
What to do...
As a temporary immediate measure, use the Battery Pack control utility in the Laptop to configure the battery pack power usage by adjusting the charging control utility to “Eco Mode”. Contact Panasonic by referring to the below information to register your details and to receive the new Battery Diagnosis/Control Program.