Hey I did not see you respond to my advice about the shrink tubing. If there is a short there you will fry your driver and possibly your diode as well. I just want to make sure you read that part.:beer:
UltraFire and TrustFire batteries are not good to use for lasers being driven over 700mA. The driver will get really hot and start to pulse with these batteries. Believe me I have had plenty of experience with these batteries in 1 watt and greater lasers. Try an AW or Redilast 2600 or 2900mAH 18650 instead.
I've never had any trouble with UltraFire or TrustFire batteries. Whether it's 3x10440s, 2x16340s, or 1x18650 - running them all the way up to 1500 mA, I've never seen any battery issues.
I remember seeing a chart on here somewhere, of the current-delivery capabilities of common lithium ions compared. I remember being underwhelmed by the differences between cheap UF and TF batteries, and the "high end" alternatives. Don't quote me, but I think it was +/- 10%, and not always in favour of the presumably better batteries.
I know that some people are sensitive about their battery choices, but regardless of the potential credibility of that debate, I don't think the diode issue you may or may not be having, is due to using UF or TF batteries. Lots of other people use them here too.