On my desktop PC I have absolutely no wireless peripherals connected mainly because I consider swapping/charging batteries for a desktop computer rather ridiculous.
Until now.
This peripheral will make an appearance in this week’s newsletter but it definitely deserves its own article because yeah, it’s that good.
I give you the Logitech Wireless Trackball M570. Yeah, it’s a trackball but fortunately at least the ball is blue compared to the normal HAL-like blood-red that’s normally there.
The kicker with this mouse is that it claims to hold a charge for 18 full months on a single AA battery. Bear in mind this is a plain alkaline battery we’re talking about here and not some special li-ion rechargeable or other proprietary cell. One battery, up to a year-and-a-half of charge. That’s pretty amazing.
In practical use however I’d estimate you’d get 12 months instead of 18, but hey, that’s still pretty darned good. I’d even be happy with 6.
The MSRP price? 60 bucks.
NewEgg’s (current) price? 50 bucks.
Worth it? Absolutely.
I might even switch to trackball because of this mouse. Maybe. 
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My Ihome wireless mouse gets 8 months on 2 AAs. With freeware mouse drivers, the mouse works better than any other mouse I’ve tried in AutoCAD, and the 8 month figure is 40 hours per week heavy usage.
I bought this: http://www.newegg.com/Product/Product.aspx?Item=N82E16826140046 with a netbook about 1.5 years ago because it was a cheap combo deal. I’ve never once changed the 2xAAA [stock] batteries in it and it still works fine. Granted I don’t use it THAT much, but there have been many times I’ve used it for several hours at a time, and quite a few times I can remember when I left it on overnight, or forgot to turn it off before putting it away. I don’t understand where the power is coming from anymore!