i love small single battery lights . i like them very small for the battery they use. i also love very very efficient lights. i mean the most lumens per watt of power they use
My small ones:
Sofirn SC01, max output 330lm,
Pineapple Mini at 240lm,
Acebeam TK16 with 1250-1800lm depending on the LEDs. I have sst-20.
Maybe the Manker E14 III powered by a 18350 and managing a 4000lm output is still in this category?