| The SP comes with a well-designed power adapter that recharges a built-in battery; its prongs fold in for easier storage. Our informal tests found that it takes about four hours to fully charge (you can even play it while it's plugged in and charging), and the battery lasts about 11 hours with the backlighting constantly on--your results may vary. Using the backlighting less often will conserve battery power. With separately sold cables, you can connect the Game Boy Advance SP to other GBAs for multiplayer gaming (above) or to the Nintendo GameCube (below) to access secret levels, exchange data, or use other special features that vary from game to game. The quality of the backlighting is very good. It's bright and clear when looking directly at it, but degraded from other angles. This is only a problem for friends who are watching the screen from over your shoulder. But size, power, and affordability do not come without trade offs. There's no headphone jack here, though Nintendo promises an adapter. The system isn't very loud at its highest volume, and the sound can be turned down to socially acceptable levels. The L and R shoulder buttons are a fraction of the size they were on the GBA, and thus are harder to hit. Also, the reduced size of the SP is slightly less comfortable for adult hands than the GBA, but perhaps more comfortable for smaller hands. The cartridge port placement on the lower part of the console is fine for GBA games, since they are flush with the console body, but older Game Boy Color carts will stick out in a way that takes some getting used to. | 
