LG has announced recently that their newest flagship phone, LG G5 will land in the US sometime in early April. The actual release date is not known yet.
People, who buy a G5 in the US will receive a free second battery and a charging cradle. This offer will be available for a limited time, we don't know exactly for how long.
There is no info about this promotion in other regions.
If you don't remember, the specs for the G5 looks like this:
5.3-inch display
Qualcomm MSM8996 Snapdragon 820 - H850 or Qualcomm MSM8976 Snapdragon 652 - H840
32 GB, 4 GB RAM (H850), 3 GB RAM (H840)
16 MP primary camera
8 MP front camera.