I found the problem with the battery life. #StraightOuttaShenzen
Update: this "1 Watt" LED torch draws 0.2 watts and its lithium cell measures at 45mAh, hitting low voltage cutoff (lol there is no safety circuit here, but if there was...) after 40 minutes runtime.
ETA: It would work for less than 10mins if it really was 1W.