I’d say that it’s necesssary to use protected cells in any light that uses cells in series, and it’s advisable to use protected cells in any single-cell light without low-voltage cutout, such as those that can take either AA or 14500 cells.
Should protected cells be used in lights that use multiple-cells in parallel?
I don’t know, why are you?
Some reasons might be;
Read all other threads and where curious?
want to get in a couple more post to reach 1000?
The power compelled you to?
If you could fire a laser in one direction of the cosmos and it didn’t disperse or hit anything that would absorb it, given enough time. would you see it coming from the opposite direction from where you sent it?
Is there something like Moore’s law with LED emitters?
I’ve refreshed many old lights with newer emitters and the increased output is amazing.
Will I look back on today’s emitters 10 years from now and laugh at how weak they are or has this technology been nearly pushed to its limit?
Not asking for crystal ball answers, just wondering if anyone has deep knowledge of how far this can go.