I’ve got a No Name XML headlamp with 2 x 18650 cells on strap at rear.
Lasts forever.

In hand I use a mix of. Depending where.
An Astrolux S41. Imalent DN35/70. or a Convot C8+.
Most of which I normally use on a strength of 50%ish.
but they have the advantage of twice that output if/or when, required.
For trails and bush I find the multi LED’s tend to give a better more all round light
than the singles.