The form and size of the calculator shell is identical to the 49g+ series, but four AAA batteries are used as opposed to three in previous models. In addition to all the features of the 49g+, the 50g also includes the full equation library found in the HP 48G series (also available for the 49g+ with firmware 2.06 and above), as well as the periodic table library originally available as a plug-in card for the 48S series, as of firmware 2.15/ 2.16 (the latest, as of 2015), and has a 3.3V TTL-level asynchronous serial port in addition to IrDA and USB Mini-B ports of the 49g+. Like the 49g+, the range of the infrared port has been limited to about 10 cm (4 inches).