that one looks like a drop in not sure how it would go with heat, i would stick to these they are a screw in type that makes better contact with the head top, bottom middle and bezel can handle long runs, no to mention better serive from manafont
TrustFire TR-3T6 Triple XM-L T6 5 Modes LED Flashlight (2 x 18650)
TrustFire TR-3T6 Triple XM-L T6 5-Modes Memory LED Flashlight (3 x 18650)
there is a thread i made here on the TR-3T6 3 X 18650