The new Game Boy Advance SP works essentially the same way previous Game Boy Advance models have, but adds a number of thoughtful features to the design. The most obvious difference you'll see is the lighting feature built into the screen so you can play in low-light situations without bulky external game lights that too often leave a hot spot on the screen or fail to reach the corners. You can shut off this internal light to squeeze more playing time out of the power source if you're in a situation with enough light to see the SP's reflective screen.
Speaking of power sources, the SP comes with a rechargeable lithium-ion battery that provides between 10 and 18 hours of gameplay from a three-hour charge. Also, the new clam-shell design will offer protection for the screen from scratches when it's all closed up. As well as playing all your Game Boy Advance games, the system is backward-compatible with almost all Game Boy/Game Boy Color titles.