Comment 66 for bug 443080

not sure if it helps, but a little trial error indicated:

Case 1: Turn on my laptop without the power cord connected.

No fsck error.

Case 2: Turn on the laptop with power cord connected.

fsck from util-linux-ng 2.16
/dev/sda5 has been mounted 34 times without being checked, check forced

A little more info:

While upgrading my internet stopped working and in the middle of the installation I unplugged all devices attached. Later I went to another location and continued my installation.

Let me know if you need more info.