Mobile screen size: Screen size contributes majorly to battery life and usability, thus affecting user experience and device functionality in a number of ways.
Screen size has a direct impact on battery life since bigger screens drain more battery. Larger screens consume more power to light up and refresh, the higher the resolution and the brightness the more power is consumed. OLED and AMOLED screens can be somewhat efficient, as they illuminate only needed pixels, however, in general, a bigger screen almost always reduces battery life unless the phone manufacturers offset the increase in screen size with an equally large battery. Also, users can waste more time, using bigger screens, and power consumption will be higher because of the extended use.
The larger the screen, the higher the usability as the visibility is better, typing is more comfortable, and the experience of media consumption, gaming, and multitasking is improved. Bigger screens are easier to navigate, have clearer text and have more space to put interactive features. This may be especially useful to users with vision impairments or those who employ their gadgets in productive undertakings such as document editing or videoconferencing.
But as they get bigger, trade-offs can occur with usability as well. Large-screen devices might be less operable with one hand, less portable, and easily dropped by accident. The designers frequently have to optimise the UI elements so that they are easy to use on different sized screens.
Simply put, although bigger displays increase visual comfort and usability, they put a heavier load on the battery and can make devices less ergonomic. The strategic compromise between the screen size and battery capacity/software optimization is crucial when making the mobile user experience satisfying.
