The battery is in need of replacement. I have an older HP laptop that says the same thing. Tested it out and it will not charge at all. I have to leave the laptop plugged into the electric socket in order to use it. Older laptops will have the tendency to have the batteries not work anymore (even if you do regular drain/recharge cycling). If you need to use it as a laptop (unplugged) I would suggest getting a replacement battery. If not, just leave it plugged in to use the laptop.