Windows 10 Mobile 14342.1004 brings battery improvements
Fast Ring Insiders get a new Mobile build with bug fixes
The new Insider Redstone build is now live in the Fast Ring. Windows 10 Mobile 14342.1004 is almost the same as the previous one (14342.1003), but it brings battery life improvements for certain devices, including the Lumia 950, 929 and others.
This build doesn’t include any new features and visible changes, but you can read about all new features in the Restone builds 14342.xxxx here.