I needed a “flashy” marketing technique to get as many folks as possible to complete a 2-3 min survey for a school project. I started with this clever lil guy but realized it wouldn’t last nearly as long as I needed it to - probably 8-10 hours at best. So I nerded out a bit on all-things-batteries and crunched some numbers and found that size D batteries should power my 3 individual 3V LED’s for nearly two weeks - Fun Fact: battery capacity is directly related to the volume of a battery, …who knew?!). Turns out I didn’t even need to add the salvaged on/off switch I stole from my kiddo’s old forgotten toy
Here’s a shameful plug to the 100% anonymous survey for my group project for if you happen to have 2-3 minutes to spare. My team would super duper appreciate it!