Did you try it in both sides? Check to make sure the contacts are clean on the battery and in the laptop.
The lights on the side never stayed on when charging for me. Only when I pressed the button did they show any level of charge.
I found when using the battery, the start time was 3.5 hr, then start Illustrator and do 5 min work and there is 2.5 hrs left.
I would contact seller and get a refund for the battery/laptop as soon as possible.
Hope this helps,
Robert