My laptop ceaseless saying "Critical Battery"

Question:the message just appear and dissappears all the time now. I know my HP PP2210 Series battery is old and prolly worn out cause it won't hold a charge for more then 10 minutes without being plugged in. im just wondering why my laptop is saying "critical battery" when its plugged in the wall Any help or information is appreciated!!! Answer:Hi. A worn out battery will pull the voltage down just by being connected. Try removing the battery and see it the adapter will power the unit all by itself. But you probably need a new battery. Sony:sony PCGA-BPZ51 battery , sony PCGA-BP2V battery , sony PCGA-BP4V battery , sony PCGA-BP1N battery , sony VGP-BPL1 battery , sony PCGA-BP2NY battery , sony PCGA-BP2NX battery , sony PCGA-BP2SA battery . Asus:ASUS M2A battery , ASUS M2C battery , ASUS M2E battery , ASUS M2N battery , ASUS M2Ne battery , ASUS M5 battery , ASUS M5000 battery , ASUS M6 battery. I hope there is can help you . good luck!