Very good value 309

The mice generally keeps his promises. I was using for years a Microsoft Natural Mouse who began to show signs of fatigue. For a fraction of its price, I win with the mouse Anker:
- A more ergonomic position, more natural
- A lighter mouse => less strenuous to move
- A discrete nano receiver (compared to the wired receiving base Microsoft almost as big as the mouse itself) and stowable in a small compartment under the mouse.
- An on / off button to make sure not to use the move batteries.

The points that make me stay in 4 star and not 5:
- A slight imbalance of the base of the mouse: a feeling it is slightly wobbly. Perhaps an adjustment problem or pads planning?
- A little difficult at first to lift the mouse to adjust the position, the surface being slightly too slippery. After a few days I start to get used and find the right places to pressure without clicking any button.

For autonomy, we will see the use it can do with its two AAA.
One caveat: the mouse goes to sleep after a certain idle time. The wakeup requires clicking a button. This is a habit, not necessarily disturbing, but that changes relative to other mice who wake up when moved.