I’d be hesitant to hang a lithium ion battery off of my keys, mainly because any dents or smacks to the cell could damage it, even if it’s in a silicone sleeve, and because I tend to be a bit rough with my keys in general. For me, it’s hard shell or stored within a light, or not at all.
Very true, I was hesitant too. Then after making a few modifications, nothing on my keychain’s sharp or abrasive enough to puncture it. If i’m doing anything physical I don’t have a keychain on me.
I find it indispensable on nights when I’m out. This finger-sized 5000mAh powerbank suits my lifestyle and minimalist carry perfectly, but it won’t suit everyones.