I have a photon freedom on my keychain because it's lightweight and non-obtrusive, but I rarely use it. There's a Peak Matterhorn 1xAAA (similar to Arc AAA) which I EDC in a Mission Wallet. The Peak is what I use when I need a light; the battery is common, inexpensive and easily replaced.
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Better is the Enemy of Good Enough.
Okay, what’s your point??