@ patmurris
I put a small magnet in the top of the cell to help it maintain the contact with the driver. It is not the best option, but it has been working so far. But I admit that stretching the tail switch spring (as Yokiamy did) or placing a spring in the driver are eventually a much better option!
@ Yokiami
Does the Reylight have PWM on High mode? In the photo it seems and I wanted to confirm that, please!
Yesterday I placed a Reylight driver in one of mine Amutorch (first with XML2 U2-1A and the with the original XPG3-S3) and I noticed that it has PWM. I didn’t know if it was defect or a driver’s characteristic, but it seems to be a characteristic, right?
Also, I agree with you that with the stock driver on AA or Ni-MH it produces higher outputs than the Reylight.
But with a 14500 battery, it seems that the Reylight produces the same or even a bit more than the stock driver.
I updated my post in case it helps anyone on this: "Review": Amutorch Stainless Steel XPG3-S3 AA flashlight [Modded TIR Lenses] - #64 by MascaratumB .