Reduce Raspberry Pi Zero power consumption

# vi /etc/rc.local

# Disable HDMI
/usr/bin/tvservice -o

# Disable LEDs
echo none > /sys/class/leds/led0/trigger
echo 1 > /sys/class/leds/led0/brightness

References :
Raspberry Pi Zero - Conserve power and reduce draw to 80mA
Controlling PWR and ACT LEDs on the Raspberry Pi