Touch Bar battery drain & memory usage

Hi, in Safari, I have setup couple of BTT touch bars for sites like Gmail (buttons only), YouTube (script, slider) and Google Docs (some scripts but mostly buttons). These touch bars are activated upon force pressing touchpad otherwise they are not visible at all and only built-in Safari touch bar is in use. And I wonder. Do the custom BTT touch bars use memory and drain battery when not in use (but still being set up in BTT) or do they only use memory and eat battery when visible?