More current draw (or if you prefer there is a reason every battery datasheet or discharge curve worth anything will have multiple lines corresponding to different currents) does tend to send voltage down which trips simplistic indicators, which the screen mods up there might also be contributing to.
When I measured things with later updates then current draw was considerably better than the first wave thing I tested initially, not as much as some of the GBA era flash carts that went lower than original games even.
Generally when playing with anything I find the indicator vs when it finally drops is quite a difference but this might be something you want to test for yourself.