I work at a school - we have a bunch of Lenovo A485. Many of them not charging. The solution this time was.
# Turn on laptop while battery and charger was connected.
# Login to OS
# Unplug battery while laptop turn on with charger connected.
# Wait a few secs. (15 aprox.)
# Connect battery again.
# Confirm that laptop is charging or repeat from step 1. Usually works in first try.
Good day to all