I just finished reviewing Razer's high-end Lancehead wireless mouse, which is based on proprietary "Adaptive Frequency Technology" to keep a strong, consistent wireless connection. But if the Lancehead's $138 pricetag is too much for you, or if you're looking for something more portable, AFT is now available in Razer's new $49.99 laptop mouse, the Atheris.
Razer claims the mouse has the world's longest battery life "among mobile productivity mice with gaming-grade features." That's a pretty specific claim, but 350 hours for two AA batteries feels like a good deal. There's an AFT 2.4GHz wireless dongle that slots into the mouse when not in use, and the mouse can also work over Bluetooth LE once you've lost the dongle.
The mouse has a 7200 DPI optical sensor, weighs 66 grams, and has a near-ambidextrious design with thumb buttons on the left side. It's available now at Razer's online store, and will hit the rest of the world by the end of the year.