I guess they’re safe because they’re not LiIon. Kinda like the 1.5v lithium AA cells you buy, but closer to 14500.
I suppose they would be good to keep in car flashlights. They won’t leak or drain in freezing temps. LiFeP04 cells that can’t be recharged. I don’t know whether to save them, or load up my 14500 size lights. The problem is, I don’t really use my AA sized lights anymore. Mostly keep them around for power failures.
I’ve tried all kinds of combinations and types of cell on mini mags (OL customs), but now I pretty much run them all with a 14650 and a short blank. Gives a little extra run time.
I have a few of the Titanium Innovations Lithium primaries (I think they’re considered 14505s), they’re 3V cells. I bought them to see if they’d run the XM-Ls in my Mini-Mag shorty’s but no such luck.
They do hold their charge like any Lithium primary but not much capacity.
After sitting in a draw for a few years I tried one in my L3 Illumination L10C (XP-L 7A3). Though I haven’t taken any measurements my eye tells me it’s noticeably brighter in all modes than when using NiMH.
Not a bad battery for a walking around the house at night or back-up light but I won’t buy any more, not worth the extra cost.
These 3.6V lithium primaries (lithium-thionyl chloride) are no good at all for flashlights.
They are designed for low current applications with years of runtime. There they excel with more capacity than any other battery type.