I will never keep a microchip control squeezelight on my keychain again, as a gen2 Inova Microlight kept turning on and draining down like that.
Now I'm trying hard to resist buying a DS version, since I already have quote]
First off for Marduke.............resistance is futile! You must get the DS!
For real man, it's a whole new level. As for the OPoster, people buy photons mostly because they are always on the cutting edge with new LED's, their cases are the most durable and the LED leads are gold plated. Also as some have pointed out the PII's are not waterproof but with the gold plated leads not only is contact improved but corrosion resistance is much improved as well. Photons will actually work underwater................the only problem is once the case is fully flooded they tend to glow dimly as water (especially saltwater) is slightly conductive. Once on dry land just shake it out and then open it up to dry when you get the chance. The PII is just about the most reliable lighting device invented by man. With the new DS bulbs you also have the option of swapping in a single 2032 batt for excellent runtimes on top of excellent output, something most coin cell lights aren't known for. Marduke, you mentioned that you own an LOD Q4. This combined with the PII DS with 2032 is my new EDC combo. With the exception of long range spotting there isn't much that this pair cannot do as far as personal lighting goes. Good choices!