In a good momentary button driver the standby current can be a few uA, way below self discharge. 10 uA would theoretically take 100 years to deplete 4*2200 mAh.
Also you could try applying d-c-fix diffuser film.
Also some kind of battery indicator would be nice.
Maybe consider XM-L2 for its lower voltage, it’ll stay in regulation longer.
Very true, 10uA is almost nearly an open circuit compared to some momentary-on factory flashlights. You would be the good candidate to program or design a driver design for this that incorporates a battery-level function, which would be a great feature.
Right now it has a XP-L 7A3, but do have a XM-L 7A2 3200K that will go in the lantern soon for more tests & photos.
I will be giving this prototype a good field test on our big back country Canoe camping trip coming up next month we do every year in May. I will have beam photos, comparison photos, etc. also LED tint comparisons & feedback from the other campers in our group on the SRK/BLF lantern’s performance compared to others we will have. Once the tests are done i will post up a rough Blueprint drawing of the lantern design with specs that we can discuss to possible improve or alter before a possible production model can be discussed with Kronos
very true, nearly 95% of all LED lanterns found today from stores have eye-searing glarey blueish cold tints. This lantern project has a nice warm white like an incandescent lamp.