Despite its flaws, the Microsoft Band 2 is an improvement from Redmond's first attempt at wearables. With an update, the version 2.0 is getting a fix for one of our biggest gripes with the device: battery life. Thanks to a new GPS Power Saver mode, you can extend your tracking time by up to four hours, according to Microsoft. The option tells the wearable to nab your GPS location in intervals rather than monitoring your movements continuously. Power Saver mode is ideal for activities like running and bike riding, and the Microsoft Health app will still map your course on both mobile and the web.