Yes, the keyboard and mouse in the wireless keyboard and mouse require batteries to be installed for normal use. Because wireless devices need to communicate via wireless signals, they need built-in batteries to provide power. In general, keyboards and mice use common battery types, such as AA or AAA batteries. After the battery is installed, the keyboard and mouse can be connected to the computer or other devices, and can be freely moved and operated. It should be noted that the life of the battery will affect the use time of the wireless keyboard and mouse, so it is necessary to replace the battery regularly.
This question is a good one, there should be keyboard and mouse without batteries, but you buy a design battery inside, so you still need to install the battery to use.