510, single atty for 1.5month, no cleaning, 10sec draws @ standard voltage, lipton PTB. Never left dry. I repace them 1/month now, when taste is a bit off due to burnt bridge wick.
801 atty, 1 per week, 5-6sec draws @ exactly 6V (step up converter), dripping.
901 atty (in the past), dry burn...