idontunderstand, I see no problem with the emitter recently received in my SKU4521200. Looks no different than this one from another torch bought more than a year ago:
As far as authenticity, I mean.
The LD-29 is a super-nice driver, but there's no room in the SK98 pill for it, too tall (untested); would require rearranging its components over a dual sided 20mm base board, like the H1-A and loneoceans' GXB20. Using one of these boost drivers and a 2S (6V) emitter is another -more expensive and with higher output performance- possibility.
The NVSW219BT-V1 (KD, 20mm copper), a high-CRI cool white (≈5700K) emitter. Maybe 500 - 600 lumens at 3A in a flashlight. Better throw and much better colour perception with it.
