This is indeed meant for the outdoors. I need it to be a set it and forget it kind of thing. I am ok with the battery bank idea, but I am not sure I have seen one that will stay on all the time. They usually require a button press to turn on after charging. If you know of one that is different let me know and I will check it out.
I have a few straw hat LEDs that I pulled from a busted headlamp. So that is an option. When the batteries are fully charged would that damage these LEDs?
Noobian:
That would work if your project is only meant for outdoors.I would suggest you use a USB power bank kit as it can both safely charge multiple batteries and also can output at a steady voltage.
Try to get a regular straw hat LED with 3.5V 150mA rating and you don't need to worry about batteries in series or a voltage booster.
