from the 300 laptops at the school i service, when that happens its time for a new battery. its just old and has been changed as many times as it can handle. if your laptops new it might be a defect and check your warranty.
i just bought it. its a refurbished laptop and the battery was chargin but then after a couple of hours i noticed nothing was happening. i dont wanna send it back cause i need it so doi just buy a new battery?