The battery. It’s something that I don’t know what to talk about – the battery life is just too amazing – I leave it on all the time and put it on my table while still constantly connected to one of my forever-turned-on laptop in the room.
I started using it when I got it, and I did not even charge it. Then, I used it for about 2 weeks, and that’s when I finally drained all of the battery out of the mouse. Charging took about 4 hours – though still usable while charging – and it’s good to go for like another month or so.
Though it is expected from Logitech – their product’s battery life is astonishing.