People seem to like the higher voltage, which equates to more airflow. At the next level lower voltage (~7.4V nominal), the airflow is a bit less, but you can get the 3-5 hours of battery life you desire. There is a large MOQ for this battery so it becomes a business decision and whether or not there is enough demand to make it worthwhile to buy 1,000 battery packs for example.
Do you have a recommendation for a higher voltage battery, then, that I can purchase and install instead of the CR123s? I do realize that this will void any warranty.