Quote RoastBiff in France:
The Wi Fi mice are a bummer though, batteries run out far too frequently and unpredictably, so I still connect my mouse with a USB lead.
I use wireless Logitech mice and keyboards on my PCs. The (rechargeable) batteries in my studio PC's mouse typically last around 2 years and the batteries in my office PC's mouse and keyboard have been in since I bought it around 5 years ago. These PCs are heavily used.
The lady elf bought a bit of a 'cheapie' wireless mouse and it needs new batteries about every 4 weeks.
An Eagle for an Emperor, A Kestrel for a Knave.