I first used the new airpacks with the ;ed display inside the mask at the county trainning center, for firefighter one when my pack had a leak. But since then i like to use that kind of pack. I have since then joined the tfd, and on our new truck we have two of these new packs and when ever we drill or anything I use the new led packs i dont seemingly find the led lights to be any type of distraction or anything at all. As far as matience we have had them on the new truck since the wetdown in november and havent had any problems as of yet with batteries but i think like any air pack by scott as long as u check and maintain the packs the batteries will last.