Battery used most frequentally in torch.
when stated like that i use D
most , because when i want a bright light that will last for all the time being out in the dark, it is usually my Ds that do it. go out in the dark, get light with Power. (had a full scale 2 day power outage last week, Fun Fun Fun.) Nothing else gets used for as long as something that CAN be used for that long
, so by default the most power gets the most used.
although i use (now) rechargable 123 use
frequently, because of size of light for pocket, just not most, but very frequentally.
and i would
BUY (and do) the 18650 torches, because they are now making ones pocketable. But i wont get them for gifts to non-flashaholics.
last poll i voted AA for battery used in general, discounting torch items. i still use more AA, for all devices.