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The Pocket has space for two AAA batteries, which provides approximately 10 hours of game play. It has a smaller link port, which requires an adapter to link with the older Game Boy. The port design is used on all subsequent Game Boy models, excluding the Game Boy Micro.
The screen was changed to a true black-and-white display, rather than the 'pea soup' monochromatic display of the original Game Boy. Also Game Boy Pocket (GBP) has a larger screen than the Game Boy Color (GBC) that later superseded it, the GBP's screen is 65mm (2.56") diagonal, width 48.5mm (1.91"), height 43.5mm (1.71") compared to a 59mm (2.32") diagonal for the GBC. Although like its predecessor the Game Boy Pocket has no backlight to allow play in a darkened area, it did notably improve visibility and pixel response-time (virtually eliminating video ghosting).