saw your post regarding the s18 v1 firmware.
I believe that is the same version that came with my s18-01. However, I notice that on the original firmware, the battery life was just horrible. The second version is just the same, however when you're at 25% and below, the battery seems to last a little longer.
And there seems to be a download called "S18 Preloaded Content", but after downloading that large file, I don't see any system files. Maybe you can send jxd an email.
Thanks and regards.