My hangover are really into this mouse!

I opted for this pointer, because you can use commercially available button batteries here. It works great and the included battery lasts with me for two months (approximately every other day is in use). However, I give only three stars because I think it's not optimal, that you have it lit keep the finger on the button so. Would be great - and I would also give a full five stars - if there would be another button for "Constant light", because after some time hurts but then slightly the finger by the constant pressure.