Acer laptops

I am planning to buy a budget gaming laptop which can run triple A games at 60+ fps with 1080p resolution. After some research, I found Acer Nitro 5 AN515-52 better for my budget (₹77,000 ~ $1100). There are laptops from ASUS, MSI, Dell and HP with similar specs but they are over my budget...

I am having a Dell laptop. But after a 2 to 3 hours of charging its laptop and it's battery is full. But then after using a laptop for an half an hour, my battery power is going to 50 % So please tell in what is the problem in my laptop