not sure if anyone here knows about surefire.
they sell 123A lithium batteries ... you know the batteries
that power flashes, p/s cameras and motion + smoke detectors ( and other stuffs).
they come in packages of 12 or 72 and have a 10year shelf life
and ... are $1.75 each
they have a dealer locater if you want to try to buy them locally.
i have a shop close to me that, but it only has onseys + twoseys,
not the 12 or 72 box, so i opted to get them online (again).
i like buying from these guys ( this is the 3rd or 4th time for me )
... it beats paying close to 13$ for a 2pack at my local pharmacy /photo store!