hp probook 4410s led is flashing ( yellow ) when AC switch is turned off

Hello,
Recently i am facing this problem after replacing battery that when i wake up in morning i see the led ( yellow ) is blinking continuously. The moment i switch on the AC power , the led stop blinking. However, i can see that the battery is fully charge 100%. I don't know the consequence . Can anyone tell me what is the problem ?

thanks
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More about probook 4410s led flashing yellow switch turned
  1. I calibrated my battery .
    This is what i did -
    1. Unplug the AC source
    2. Restart
    3. F2 and run the full hard disk test
    4. Leave the laptop to discharge the battery totally
    5. Recharge the battery

    and Problem solved.

    Thanks :-)
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