I have tried putting the light to position one and pressing on the tail like Mike suggested but no success.
To use the pressing of the head/tail cap, you must be in the P2 position. Tighten the head fully to 'off'. Slowly rotate head 'on' just until the head dot (SW) gets directly above the two dots on the body (P2). The body actually has three dots. One by itself and two others next to each other. The two close together is P2. Due to possible slight variances on Extreme III"s, the SW dot may have to placed above the second dot of P2.
From this point, you can now do the head press to program or use the other functions.
While still in that P2 position, hold the Extreme III in one hand with the tail on the palm and the head/bezel between your thumb and pointer finger. Pulling down on the head will bring you to P1 and releasing will bring you back to P2.
Try doing a master reset holding the Flashlight as above. REMEMBER... P1 is USUALLY ALWAYS the starting point and you are in P2. You must press down on the head on hold it there to stay in P1. From this P1 position, release the head and pull back so that you do P2 (head release) TEN times and stop back on P1 (head still pressed). Do this quickly, steadily and at a constant rate. A good pace would be around 10 seconds or just under to complete the above. Try not to twist the head. After the TEN P2 pumps and stopping and holding on P1 (head depressed) you should see a single blink to show that a master reset has been done.
To get out of blink, strobe, sos or any other mode when first 'on', Turn off the Flashlight by tightening head. Go to P1... wait a second or two then quickly go to P2 back to P1 then back to P2 and stop there. This should bring the Flashlight to the pre-programmed P2 setting and same with P1.
To get to strobe mode using one hand, hold Flashlight as stated above while already on P2. Press head down and hold (P1). Release head THREE times (P2) and back to P1 (head depressed). The Flashlight should be in blink mode. Release the head, to P2 and now you should be in strobe.
You can do all the other functions the Extreme III has to offer using the one hand method rather quickly. Just REMEMBER that you have to have the Flashlight in P2 to begin.... YET, you should always start at P1 by holding the head down before counting P2's.
After playing with the modes and should the mode you desire be the P1 setting. No need to keep it pressed. Simply release the Flashlight and rotate the head to P1.
Now try doing the battery voltage test. P2 x five. Flashlight again held in one hand as above in P2. Press head (P1) wait a second or so, release head (P2) five times and back to P1 and hold (head pressed). Wait for the blinks. Depending on battery type, there will be a series of blinks. First set indicates voltage in front of the decimal point... pause ... second set indicates voltage after the decimal point. Example --- Blink... pause... blink, blink = 1.2v
The battery voltage is one of the modes that you do not have to get out of. It reverts back to the last mode before battery test.
Also, see post #138 on this thread...
https://www.candlepowerforums.com/threads/185395&page=5
I'll be making another video on the other functions as well as on how to do the one hand method.
Hope this helps a bit.
Njoy...