Yeh I agree, I can't hear it at all at work with these inbuilt 1 watt speaker crap. But yeh, even at home I need to jack up the volume
i started smoking the screwdriver at 9 am, thinking the battery should be dropping of by at least early afternoon.
the battery didn't drop of until the next day!
but don't forget i was using 36mg so the device wasn't permanently welded to my face.
i would say i was using it about every half hour.
someone who's is a moderate e-smoker, the screwdriver could easily last them 2 days of use, no problem.
a heavy smoker with constant use, i would say about 8 hours of high performance.