This headlamp appears to have one of those generic mystery 3535 LED's that djozz tested (link to source of below pic and his test report is in the pic).
The good news is that it's pretty easy to swap to a XP type emitter if you have a hot air station with a small nozzle attachment. Here is the procedure:
- Unscrew the bezel and remove it and the optic.
- Slide out the plastic battery tube insert that is behind the emitter.
- See more detail 2 posts down.
- Push the MCPCB back a tad so that it's not touching the headlamp body.
- Use a hot air gun with the smallest nozzle to remove and reflow in a new emitter.
- Let the light cool back down and reassemble.
I tried a Nichia 219C 5K 83CRI emitter last night. Made the beam more throwy and less yellow. I would like to keep the low Vf and decent CRI, but prefer the stock floodier beam pattern better. So maybe tonight I will swap in an XPL. I'll take some pics this time.
EDIT: The light appears to have a proper charging algorithm and cuts off at 4.2volts. I'd like to tear down the light more to see what type of chip it has, but disassembly looks tricky.
EDIT2: Something to watch out for. The MCPCB is a long aluminium strip that goes along the frount side of the battery tube. The strip is held in place by plactic insert. The optic pushes back on the MCPCB and could potentially push the MCPCB back reducing contact with the host. With the emitter only drawing about 1 amp (guess based on output), that probably isn't an issue. Just something to be aware of depending on what type of mods you make to this light.