probably. I used a pcb with underglow only in the past, and even with external power disabled in the fw the drain was still noticeable

the poor battery life is because of the oleds. another thing to take note of is that underglow leds will draw power even when disabled.

if you really want/need displays go for the nice!views and you'll get around of week of uptime on the central half.

I have 600mah in my build and the central half gets roughly two months on one charge, no displays