I believe there is another missing dependency, this time on a perl module, but I have much less experience with perl than with python.
The error is: $ /usr/share/battery-stats/battery-stats-graph-flow Can't locate Text/CSV.pm in @INC (you may need to install the Text::CSV module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base .). BEGIN failed--compilation aborted. line 0: warning: Skipping data file with no valid points gnuplot> plot "/tmp/tmp.n4Ju0ZvAI4" using 1:2 smooth unique axis x1y1 title "Energy flow" with dots ^ line 0: x range is invalid -- Elena ``of Valhalla''