What&#x27;s the expected lifetime of a mouse, and what&#x27;s the expected useable lifetime of a li-ion battery?  Yes, it will degrade over time, but you&#x27;ll continue to get use out of it.  I&#x27;d peg both at about 4-5 years at this point.<p>It&#x27;s not apple that&#x27;s implementing planned obsolescence.  It&#x27;s the entire industry, and it&#x27;s defacto obsolescence.  Or would you still expect to be using your microsoft ball mouse from 1999 today?