Originally Posted By: andy
I do however wish it didn't have a sealed rechargeable battery frown

If you open up the mouse, you'll find it is one of the other removable Lithium packs that Logitech uses so it is possible to swap it out.

Originally Posted By: andy
And of course it gets very heavy use, at least 10 hours most days.

Hmm. My 2nd revision MX Revolution dies after a couple of days with similar usage. Wonder whats wrong with it.

I bought a couple spares when Logitech announced that the MX Revolution was being discontinued as I don't like the Performance MX which replaced it. The Performance MX has the Darkfield technology and the ability to tether the mouse so you can charge it whilst using it though which are both nice features. It lacks the software controlled wheel however which I've found is really nice.