If they drive the LED at a higher voltage then they may actually not last as long as AA batteries despite having a greater energy capacity. 14500 batteries don't have anywhere near the capacity of 18650 batteries in any case so I recommend torches that use those instead.
Nothing beats the 3,400 mAh 3.7v 18650 batteries on the market at the minute.
Nothing beats the 3,400 mAh 3.7v 18650 batteries on the market at the minute.