Laptop suddenly shuts off while booting in new battery

rider

as Kratos
I just replaced the battery of my hp pavilion dv6-6165tx laptop with a lapcare replacement 6-cell battery. It works fine, gives backup of 3.5-4 hours. The only problem I'm facing is that whenever I turn on my laptop in battery. It shows boots or even get into home screen but suddenly laptop turns off suddenly. The only way to use on battery is by turning it on AC supply and the unplug the charger after opening the windows. Tell me what is the issue? :?

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FYI Using windows 8.1 pro with full updates.

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Sometimes when I open my laptop it shows this message.
IMG_20140309_114302_1.jpg
 
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