[jyl]

I hope it only uses the wifi to update software. Like red says, wifi will suck the battery.

The battery on these smart watches is 1/5 the capacity of an iPhone 5 battery. So power consumption is critical.

Apple knows a lot about power saving. They and Samsung are the only smartphone makers who design their own processors. Apple also makes their own OS and most of the apps. So if anyone can get decent battery life from a smart watch, it really should be them.