I'm in , if the head - body tube fitment issue can be resolved ..
Many times I have wanted to help someone get a quality light but did not want to burden them with lithium-ion batteries and chargers . Some people are better off with plain old off-the-shelf alkalines .
IMHO, no. We thought about this and decided to go with memory. No memory with low low is good for a small keychain light, but this will be used on low or med most of the time => working (<2s off) memory is the way to go.
You may be breaking Bort’s light fast, can you do a automatic turbo stepdown option (maybe a solderable star) to prevent overheating for non flashaholics, or a thermal sensor with automated power reduction?
Some questions, can the LED be replaced (sinkpad/noctigon) by me or be purchasable with it?
Will it have a linear or buck driver?
Will the body be plastic or metal?
Will it have polarity protection?