Emisar D4V2 and D4SV2 auxillary LED current draw here is the drain with the aux lights. I’m assuming that the aux led ciruits are the same in KR4 as D4V2 and only the main led driver parts are changed. You can see that the aux on high uses a lot of power. Will drain a battery in approx a month or so. High aux also uses more power and creates less light vs the main LED in the lowest mode. But then KR4 lowest starts at 3/150 while D4v2 starts at 1/150 so that’s debatable.