Abstract: The present disclosure discloses an uninterruptible power supply and a capacity expansion method for an uninterruptible power supply. The uninterruptible power supply includes a power supply main body, the power supply main body is provided with a built-in battery and a first electrical contact structure electrically connected to the built-in battery; and a capacity expansion battery module detachably connected to the power supply main body, wherein the capacity expansion battery module is provided with a second electrical contact structure; and the capacity expansion battery module is configured to be electrically connected to the first electrical contact structure through the second electrical contact structure, so as to be connected in parallel to the built-in battery.

Abstract: A display panel and a terminal. The display panel includes a liquid crystal array matrix cell, a backlight module, a light guide column, and an electrochromic module. A through hole is formed in the backlight module, and the through hole is used for accommodating the light guide column. The liquid crystal array matrix cell is located on a first side of the backlight module, the electrochromic module is located on a second side of the backlight module, and the first side of the backlight module and the second side of the backlight module are opposite sides.