These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] sys-power/acpi-1.8::gentoo  104 KiB
[ebuild  N     ] x11-misc/xbattbar-1.4.9::gentoo  19 KiB

Total: 2 packages (2 new), Size of downloads: 123 KiB