[Yellow Rat]

Hello i Just bought new 4GB 4G nano look-a-like player. Photos included below. I am pretty happy with it, only thing that bothers me is battery life. As i understand that's normal for that kind of device. I was thinking of replacing it's battery with battery from ipod nano. First how do i disassemble. I removed rear cover, and unscrewed to screws. Then i remover screen cover, but was unable to slide it down.