The term "mice" (as a plural for "computer mouse") grew in popularity simply because of common usage among everyday people. But "mice" refers to rodents, not computer peripherals. Microsoft uses the term "mouse devices" to signify the plural, and has done officially since 1995 when they published "Microsoft's Manual of Style for Technical Writers", under the heading, "Referring to the Mouse Correctly", instructing employees to avoid the term "mice", although they do sometimes refer to the plural, "mouses" (as in their renaming a quickbasic directory from "mouse" to "mouses").
But the bigger problem is walking into a computer store and up to the salesman and asking him if he has mouse balls.
But the bigger problem is walking into a computer store and up to the salesman and asking him if he has mouse balls.