Well after 1 hour 15 mins the jetbeam is down to 30% -ish while the m3 is still going strong
1 hour 30 the jetbeam's had it.
(M3 diminished but still usable. 1.50 m3 gone too)
Just tried them both on 'low' (in daily mode).
the jetbeam lasted between 5 hours and 17 hours (don't know exactly!) while the M3 is still going after 17 hours...
I put them on last night for 5 hours. Went to bed with them off, got up & switched them on and went to work and when I got home the jetbeam was dead but the M3 still going. (Both 1 AA eneloop battery). That's why I don't know exactly. I will try again to find out an exact time.
On low the jetbeam was brighter however, which would explain the lower runtime.