UPDATE #16
RedFish OS recovery image boots a freshly installed SailFish OS, video in HD resolution:
The video above replace the older one for which the dots are full red but in the video are showing like orange because the over-exposition.
Rationale
When connected to USB data link port, the RFOS boot image starts in recovery (maintenance) and allows to update the boot_a and boot_b partitions and flash the userdata partition plus others activities via telnet menu or SSH shell.
Otherwise it boots normal into the operative system installed on the smartphone. In this case a fresh installation of SailFish OS 4.5.0.21 completed by the RFOS recovery image itself.
Nightly stats
As you can see the average current absorption in around 100 mAh
=> Current 10s average absorption:
\_ samples: 8859
\_ min: 99 mAh
\_ avg: 101 mAh
\_ max: 107 mAh
=> System report and init log:
\_ load avg: 2.23 2.05 2.02 1/359 15271
\_ sleep drift: 4008 ppm 103.199 %
[ 3.048092] initrd: 1st line in /init.
[ 3.060950] initrd: recovery functions loaded.
[ 3.061077] initrd: preparation completed, start.
[ 3.069264] initrd: USB data link config, finding...
[ 4.692482] initrd: USB data link found at 5* attempt.
[ 4.718540] initrd: set display_bright_dim 2 and read 512.
[ 4.813341] initrd: current pid 1 current affinity list: 0.
[ 4.816395] initrd: telnet/ssh on 10.42.66.66, udhcpd running.
[ 5.000343] initrd: hostname 'recovery' init process completed.
While the boot processes has been further optimized by parallelization and it lasts 2 seconds not anymore the 2.5 seconds like before. A small improvements but 20% less.