. Remove the battery cover, remove the battery, see a screw, unscrew.
For this problem, you can try holding down the mouse base and then gently pulling out the USB plug with one hand.
If this method does not work, you can try using some tool, such as pliers or flat nose pliers, to hold the USB plug and gently pull it outward. Be careful not to use too much force to avoid damaging the USB plug or mouse base.