I am working on making a costume that will require the use of fairy lights also known as string lights. It requires 16 separate strings and each string has its own small battery pack which contains 2 cr2032 3v batteries and a on/off switch. So a total of 32 cr2032 3v batteries
These are the lights I purchased.
So for testing purposes I tested this with 4 fairy lights and 1 9V battery. Note I have tried wiring 2 strings to 2 AAs and the brightness was not there. Not to mention having to carry around 32 AAs would be a bit tedious. Attached is an image of how I wired it up in series and parallel.
Series wiring - LEDs would not light up
Parallel wiring - LEDs would light up however the battery slowly started getting hotter and hotter.
My question is, what would be the easiest way to wire all of these into 1 switch safely. Please keep in mind that this will be part of a costume so I'd like to keep weight down to a minimum. Note that carrying 4 9V batteries is alot ligher than 32AAs. I'm just not sure how I would wire them. And if resistors are needed, what size and where would they be inserted?
New Image wiring: