Purpose of `energy_full`

[savchenko]

Used, but not declared previously:

batenergy/batenergy.sh

Lines 60 to 61 in 07b44f6

	energy_diff_pct=$(bc <<< "scale=1;$energy_diff * 100 / $energy_full") # %
	avg_rate_pct=$(bc <<< "scale=2;$avg_rate * 100 / $energy_full") # %/h