Question

A user reports that their laptop battery no longer charges past 40% and drains rapidly during normal use, even though the AC adapter is connected and the charging LED is lit. The laptop is about four years old and has been used daily. After confirming the AC adapter outputs correct voltage and the system runs fine on AC power, what is the MOST likely cause?

Accepted Answer

The lithium-ion battery has degraded and reached the end of its charge-cycle lifespan

Answer

The DC jack has failed and is no longer delivering power to the system

Answer

The system BIOS needs to be reset to factory defaults to restore charging

Answer

The AC adapter wattage is too low for the laptop's power requirements