Ah, thanks! Good to know I dodged that bullet by blind luck. I had picked up a couple of USB-port charged version of one of those old chubby non-rechargeable lithium batteries that were used in early LED flashlights (CR2 I think) to resurrect some old steel LED flashlights I found in a drawer, and got funny fantasies about doing other devices this way.
I saw some articles and ads for doing it using 3.1V LiFePO4 batteries but I couldn't find any of those with USB charge-ports... I guess your warnings are why you're supposed to use the 3.1V Li-phosphates for that. So I went with the 3.7V LiIon because I really wanted that port.
I guess I dodged a bullet. Thanks for the warning. I actually did systems engineering as an undergrad (though I just work in software) so that makes me a bit overconfident with electronics even though I don't know jack about battery chemistry besides the basic theory. I'll be more careful on research next time I undertake this kind of project.
It seems like you might be looking for "1.5V Li-ion AA", which is a 14430 with a buck converter stuck on the end.
I have pretty much the opposite preference regarding charging: I'd much rather swap in a charged spare and stick the drained battery in a slot charger than charge batteries inside devices. There's no waiting that way.
I saw some articles and ads for doing it using 3.1V LiFePO4 batteries but I couldn't find any of those with USB charge-ports... I guess your warnings are why you're supposed to use the 3.1V Li-phosphates for that. So I went with the 3.7V LiIon because I really wanted that port.
I guess I dodged a bullet. Thanks for the warning. I actually did systems engineering as an undergrad (though I just work in software) so that makes me a bit overconfident with electronics even though I don't know jack about battery chemistry besides the basic theory. I'll be more careful on research next time I undertake this kind of project.