How to Charge Rechargeable Batteries Via a Micro USB Port in a Portable USB Charger
Also, if possible, I'd love to be able to use the 18650 (EFest IMR) as the rechargeable battery/batteries. I have a few of them that I use for e-cigarette mods and they hold a good amount of juice so why spend more money on rechargeable batteries when I already have some. But if using more conventional batteries would make things easier then that's not a problem at all.
I can't wait to hear the community's input on this. And to those who are the knowledgeable ones in this field, don't feel obligated to say everything entirely in layman terms for my benefit - what I don't know I will look up; how else are we supposed to learn new things anyway? Thank you for your time and for any help you can offer!