My Notebook shut down at 40 to 50% and its use on battery

[MandeepSingh9]

My notebook shut down at 50% battery when its on battery. When its come near at 40% to 50% , My notebook has been gone to shut down automatically without warning. When I plug socket to use laptop, then There are two light one is Red for Charging and White for full charge. When I plug the point with laptop, Charging is done but sometime automatically showing red and white one by one. I used try to find the problem of this issue. Battery is ok and hardware is also ok Using diagonstic of Hp software.

Please help me to find my notebook , it is immediently.

[Huffer]

We need the advanced output of the battery test to see what is going on. The simple "OK" is useful but not that informative. If the battery is at or over 2 years old, and acting up, 99 times out of 100 the battery needs to be replaced. 

[MandeepSingh9]

According to my Notebook, I had purchased it over a one year, so battery not much old.

[Huffer]

Still needs to be tested