Estimated volume of the device, calculated from the dimensions provided by the manufacturer. Applies for devices in the form of a rectangular parallelepiped. Connectivity Information about other important connectivity technologies supported by the devices. Connectivity Battery The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices. Capacity Video file formats/codecs Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data. Video file formats/codecs Sensors Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device. Sensors

The various types of memory cards are characterized by different sizes and capacity. Information about the supported types of memory cards. Display The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc. Type/technology There are several versions of the Universal Serial Bus (USB) standard: USB 1.0 (1996), the USB 2.0 (2000), the USB 3.0 (2008), etc. With each following version the rate of data transfer is increased. Information about the number of pixels per centimeter (ppcm) or per inch (ppi) of the display. The higher the pixel density, the more detailed and clearer is the information displayed on the screen.

One of the main characteristics of the cameras is their image resolution. It states the number of pixels on the horizontal and vertical dimensions of the image, which can also be shown in megapixels that indicate the approximate number of pixels in millions. Information about the sensor type of the camera. Some of the most widely used types of image sensors on mobile devices are CMOS, BSI, ISOCELL, etc.

RAM (Random-Access Memory) is used by the operating system and all installed applications. Data in the RAM is lost after the device is turned off or restarted. Brand and model Information about the brand, model and model alias (if any) of a specific device. BrandSystem on Chip (SoC) A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device. SoC Information about the number of pixels on the horizontal and vertical dimensions of the photos taken by the front camera, indicated in megapixels as well. The color depth of the display is also known as bit depth. It shows the number of bits used for the color components of one pixel. Information about the maximum number of colors the screen can display. USB interface in mobile devices may be used for different purposes such as battery charging, using the device as a mass storage, host, etc. No, this is not necessary. With older batteries this was the case. Lithium-ion batteries can be charged after use and be taken off the charger when needed.