D255 not charging

my acer apire one d255 cannot recognise the battery when i charge it, though its working if connected via AC adapter. what will i do so that the battery will charge? thanks
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More about d255 charging
  1. If you have had the battery for a long time then maybe it's no longer any good and when you connect the ac adapter your not really using the battery , so you may have a dead battery.
  2. Dead battery! If your laptop won't charge it, then it is most likely dead. Some hardware providers supply battery testing software with laptops. You may find a program on the internet that can test your battery to see if it will hold charge. Could possibly be the connection between the battery and the motherboard!?
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