LG's new X series phones focus on battery, data, screen and style, respectively

When LG announced its new X series of "specialist" smartphones in February, saying each device would focus on precisely one key feature, it wasn't kidding. After launching two such phones in March — LG X cam and LG X screen — it has now announced four more devices. 

The new phones, called X power, X mach, X style and X max, focus on battery life, data transfer speed, stylish looks and screen size, respectively.

In its press release, LG did not release a full set of specs for any of the devices. Here's what we do know, though: