I've had one of these for a couple of years now. I installed the software, found that it did nothing useful, and removed it. As I recall, all it did was report the charge state of the battery, which is quite evident from the LED on the charger. I wondered why they offered it, I guess now I know why. In the US at least these came with an AC adapter to let you charge from a wall outlet as well as charge from a USB port. They're actually a pretty handy device for keeping portable mouse batteries charged.
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I've had one of these for a couple of years now. I installed the software, found that it did nothing useful, and removed it. As I recall, all it did was report the charge state of the battery, which is quite evident from the LED on the charger. I wondered why they offered it, I guess now I know why. In the US at least these came with an AC adapter to let you charge from a wall outlet as well as charge from a USB port. They're actually a pretty handy device for keeping portable mouse batteries charged.