This script was written to demonstrate and test the various methods known to extend battery life when using an intervalometer (time lapse) script. These are : 1. * Lock the autofocus. 2. * Turn the backlight off. 3. * Turn the display off (on camera that supports that - typically models with an OVF)\ 4. * Switch to playback mode between shots. 5. * Enter sleep mode between shots (on cameras with a "short cut" button) Discussion thread for this script is here : Battery Intervalometer​ . Save it with .lua file extension - something like miser2.lua props=require("propcase")