Seems most of the batteries I have that are 14500, 18650, 21700, 26650, etc had notes that outlined a service life of 500 cycles or 3 years. Service life being till the battery only holds a 75% ish level from the rating. So having to many of these type of batteries outside of a light, battery pack, etc would seem to be excessive for most users. Even if you were draining the battery twice a week it would equal only 300 or so cycles over 3 years. Primaries like non rechargeables like cr123a, Eveready L91/93 have shelf life measured in decades and then there's Eneloops of which I've been using AA & AAA sizes for more than 5 years with no noticeable loss of service life/time.
With all of that said I have only a few back-up 16340/18350/14500/etc cells around. Two to 3 dozen of the Cr123a/L91/L93 etc(each) types are in the same small ammo can as the others, the eneloops are mostly in a desk drawer. The can also has a 25000mah solar charged battery back up, 2 bay charger & a few incan bulbs that might be needed in a pinch.
