Why does my laptop battery not fully charge?
Computer AC/DC cable is bad not allowing the computer battery to charge
Verify that the AC/DC cable is not bad by removing the battery from the laptop and seeing if the computer can power on without the battery.
Battery is bad or old
If the power plug is good, it's likely your laptop battery is bad. If you're using a laptop with Microsoft Windows, consider getting and installing BatteryCare on the computer to look at the total capacity of the battery.
Try leaving the laptop connected to the power with the battery inserted for at least two hours. If the battery still doesn't seem to charge, we suggest having the battery and the laptop serviced or repaired.
If the computer and battery is not under warranty, we suggest replacing the battery as it's very likely that it's a bad battery. For additional buying tips and information on buying a new battery, see our battery buying tips.
Battery charger board is bad
If you replace the battery but it still won't charge, your laptop's charger board may be bad. In this case, we strongly recommend you have the laptop professionally repaired.